Free & Open Source · 15 Categories · 160+ Links

The Free Resource Library

A living collection of the best free, open-source, and community-driven learning resources across every domain I build in — AI and local LLMs, bio-signals and neurotech, assistive tech, generative music and DSP, biocomputing, electronics, radio, robotics, agriculture, and code. Everything here is free or has a generous free tier. No paywalls required to start learning.

15Categories
160+Curated links
100%Free to access
0Paywalls to start
Jump: Maker Hubs AI & ML Local LLMs Electronics LoRa & Mesh Bio-signals Assistive & AAC Biocomputing Audio & Music Mental Health Agriculture 3D Printing Robotics & Sensing Programming Open Knowledge
🔨

Learn to Build — Maker Hubs

The best community platforms for hands-on projects, tutorials, and DIY guides.

11 resources
  • Instructables The web's largest collection of step-by-step DIY projects — electronics, craft, food, woodworking, and everything in between.
    Free
  • Hackaday Daily hardware hacks, teardowns, and engineering deep-dives from one of the most respected communities in maker culture.
    Community
  • Adafruit Learning System Thousands of open, illustrated tutorials covering CircuitPython, Arduino, Raspberry Pi, sensors, and wearables — all freely available.
    Free
  • SparkFun Learn Well-written tutorials from SparkFun's engineers covering electronics fundamentals, sensors, microcontrollers, and communication protocols.
    Free
  • Hackster.io Project hub hosting thousands of community-built IoT, Arduino, Raspberry Pi, and AI edge projects with full code and wiring diagrams.
    Community
  • Make: Magazine Online The publication that launched the modern maker movement — projects, guides, and maker fair coverage at the intersection of tech and craft.
    Free
  • iFixit The world's largest free repair manual — teardowns and repair guides for phones, laptops, appliances, and more, under Creative Commons.
    Open Source
  • Hackaday.io Project-sharing site from the Hackaday team — log your build, get feedback, and browse tens of thousands of documented hardware projects.
    Community
  • element14 Community Huge electronics engineering community with forums, project challenges, free datasheets, and deep technical discussions.
    Community
  • Tinkercad Free browser-based CAD, circuit simulation, and code blocks — great starting point for both 3D design and electronic circuit prototyping.
    Free
  • Seeed Studio Wiki Extensive documentation and tutorials for Grove, XIAO, Wio, and ODYSSEY hardware — strong on IoT and AI edge modules.
    Free
🧠

AI & Machine Learning

World-class courses and resources for learning AI from the ground up — free, no gatekeeping.

12 resources
  • fast.ai — Practical Deep Learning Jeremy Howard's landmark course: learn deep learning top-down with real code from day one. Free notebooks, lectures, and a supportive forum.
    Course
  • Hugging Face Learn Free courses on NLP, diffusion models, RL, audio, and more — all using HF's own open libraries. Hands-on, practical, and kept up to date.
    Course
  • Andrej Karpathy — Neural Networks: Zero to Hero Build backprop, micrograd, GPT, and tokenizers from scratch in pure Python. The best "how does it actually work" series on the internet.
    Course
  • Google ML Crash Course Google's self-study course covering linear models, neural nets, fairness, and real-world ML system considerations. Free with interactive exercises.
    Course
  • MIT 6.S191 — Introduction to Deep Learning MIT's official deep learning intro course — lectures on CNNs, RNNs, transformers, generative models, and reinforcement learning. Full videos free.
    Course
  • 3Blue1Brown Grant Sanderson's visually stunning explanations of neural networks, backpropagation, transformers, and linear algebra — intuition first, math second.
    Free
  • DeepLearning.AI Short Courses Andrew Ng's platform offers dozens of short, practical courses on LLMs, agents, RAG, fine-tuning, and AI engineering. Many are free to audit.
    Course
  • Papers With Code Tracks ML research papers alongside the code that implements them — searchable by task, dataset, or method. Stay current with the state of the art.
    Research
  • Stanford CS231n — Convolutional Neural Networks Stanford's landmark computer vision course. Slides, notes, and past assignment materials are publicly available — rigorous and thorough.
    Course
  • Kaggle Learn Free micro-courses on Python, pandas, ML, deep learning, feature engineering, and SQL — all runnable in free cloud notebooks.
    Free
  • StatQuest with Josh Starmer YouTube channel demystifying statistics, ML, and bioinformatics one concept at a time — famously clear explanations with hand-drawn graphics.
    Free
  • Anthropic Cookbook (GitHub) Official code examples, patterns, and best practices for building with Claude — prompt caching, tool use, multi-agent, and more. MIT licensed.
    Open Source
💾

Local & Open LLMs

Run powerful language models entirely on your own hardware — private, offline, and free.

10 resources
  • Ollama The easiest way to run LLMs locally — one command to pull and run Llama, Mistral, Gemma, Phi, or hundreds of community models on Mac, Linux, or Windows.
    Open Source
  • llama.cpp High-performance C++ inference for LLMs using the GGUF format — runs on CPU, CUDA, Metal, and ROCm. The engine that powers most local LLM tools.
    Open Source
  • LM Studio Desktop app for discovering, downloading, and chatting with open models locally — built-in model browser, OpenAI-compatible local server.
    Free
  • Open WebUI A beautiful, feature-rich self-hosted web UI for Ollama and OpenAI-compatible APIs — conversations, RAG, image gen, user management, and more.
    Open Source
  • Hugging Face Models Hub Half a million+ open model checkpoints — GGUF, safetensors, PyTorch. Filter by task, license, or size. The world's open-model library.
    Open Source
  • GPT4All Desktop application from Nomic AI for running chat models entirely offline on consumer hardware — includes a curated set of models, no GPU required.
    Open Source
  • Mistral AI (open weights) Mistral releases powerful open-weight models (Mistral 7B, Mixtral, Mistral Small) under Apache 2.0 — competitive with much larger proprietary models.
    Open Source
  • text-generation-webui (oobabooga) The Swiss-army-knife local LLM web UI — supports GGUF, GPTQ, EXL2 formats; one-click installs, API server, extensions, and LoRA fine-tuning.
    Open Source
  • Together AI Cloud API for open-source models (Llama, Mixtral, FLUX) with a generous free tier — useful for testing open models without local GPU resources.
    Free
  • vLLM High-throughput and memory-efficient inference engine for LLMs — PagedAttention, continuous batching, OpenAI-compatible API. Best for serving at scale.
    Open Source

Electronics & Arduino

From first LED to advanced embedded firmware — everything you need to go from schematic to circuit.

12 resources
  • Arduino Official Documentation The complete Arduino language reference, board pinouts, tutorials, and IDE guides — the authoritative starting point for Arduino development.
    Free
  • ESP-IDF Documentation Espressif's official SDK documentation for ESP32 and ESP-IDF — peripheral APIs, Wi-Fi/BLE stack, FreeRTOS integration, and example projects.
    Open Source
  • Random Nerd Tutorials Sara and Rui Santos' site — hundreds of practical ESP32, ESP8266, and Raspberry Pi tutorials with full wiring diagrams and tested code.
    Free
  • Paul McWhorter (YouTube) Exceptionally clear, patient electronics and Python tutorials — famous for his Arduino and Raspberry Pi series for absolute beginners.
    Free
  • EEVblog Dave Jones' engineering video blog — in-depth product teardowns, circuit analysis, oscilloscope tutorials, and honest electronics reviews for engineers.
    Free
  • All About Circuits Free textbook-quality electronics learning resource: DC, AC, semiconductor, digital, signal processing — plus a huge community forum for Q&A.
    Free
  • KiCad EDA The leading open-source PCB design suite — schematic capture, PCB layout, 3D preview, Gerber export. Used by hobbyists and professionals alike.
    Open Source
  • CircuitLab Browser-based circuit simulator and schematic editor — prototype and simulate analog and digital circuits without installing any software.
    Free
  • EasyEDA Free online schematic and PCB design with one-click BOM ordering from LCSC — enormous component library, great for quick affordable prototypes.
    Free
  • Datasheet.live Quick lookup for electronic component datasheets — search by part number and get PDFs instantly. Essential when debugging unfamiliar chips.
    Free
  • Falstad Circuit Simulator Real-time interactive circuit simulation in the browser — visualize current flow with animated arrows. Great for developing intuition about circuits.
    Free
  • Texas Instruments WEBENCH TI's free online design tools for power supplies, op-amp circuits, and filters — generates schematics and BOMs based on your specs.
    Free
📡

LoRa / Mesh / Ham Radio & SDR

Off-grid communication, software-defined radio, and the open mesh protocols that keep networks alive when the internet is down.

11 resources
  • Meshtastic Open-source LoRa mesh networking firmware and app — encrypted off-grid messaging over kilometres, no internet or SIM required. ESP32/nRF52 based.
    Open Source
  • The Things Network Global community LoRaWAN network — free IoT connectivity for sensors and devices. Great documentation and community gateways worldwide.
    Community
  • Heltec LoRa Boards Documentation Official docs for Heltec WiFi LoRa 32, Wireless Stick, and other LoRa/ESP32 combo boards — pinouts, examples, and Arduino library guides.
    Free
  • RTL-SDR.com The definitive resource for software-defined radio with cheap RTL-SDR dongles — tutorials for receiving ADS-B, weather satellites, trunked radio, and more.
    Free
  • ARRL — Amateur Radio Relay League The ARRL is the national organization for ham radio operators in the US. Free online study resources, band plans, and technical references.
    Free
  • GNU Radio Open-source software development toolkit for signal processing — build radio receivers, transmitters, and analyzers with Python and visual flowgraphs.
    Open Source
  • Arduino LoRa Library (Sandeep Mistry) Widely-used Arduino library for SX1276/77/78/79 LoRa chips — clean API for sending and receiving LoRa packets from any Arduino or compatible board.
    Open Source
  • OpenWebRX+ Open-source SDR receiver application running in the browser — access your RTL-SDR or other SDR hardware remotely over a web interface.
    Open Source
  • RadioReference Comprehensive database of radio frequencies, trunked systems, and scanner programming data — essential reference for radio hobbyists worldwide.
    Free
  • Signal Identification Wiki Community-maintained database of radio signal modes and sounds — great for identifying unknown signals when scanning with an SDR.
    Community
  • LilyGO LoRa Series (GitHub) Official example sketches, board definitions, and pinout references for the popular LilyGO T-Beam and TTGO LoRa32 development boards used widely in mesh projects.
    Open Source
🧬

Bio-signals & Neurotech (EMG / ECG / EEG)

Open-source tools, sensors, and learning resources for reading the body's electrical signals and exploring brain-computer interfaces.

15 resources
  • MyoWare 2.0 Muscle Sensor The go-to wearable EMG front-end for makers — snap-together electrode design, single-supply, plug-and-play with Arduino or ESP32. The easiest way to start reading muscle signals.
    Hardware
  • Muse Headband Consumer 4–5 channel dry-electrode EEG headband with an open SDK and LSL/BrainFlow support — a friendly entry point into real EEG for meditation feedback and BCI experiments.
    Hardware
  • NeuroSky Maker of the low-cost single-channel TGAM EEG chip behind many DIY mind-reading headsets — ThinkGear protocol is well documented and easy to parse from any microcontroller.
    Hardware
  • Backyard Brains SpikerBox An affordable, open neuroscience amplifier for recording real spikes and EMG/EEG — designed for classrooms, with free Spike Recorder software and a huge library of experiments.
    Hardware
  • OpenBCI Open-source biosensing hardware and software for EEG, EMG, and ECG — community platform for brain-computer interface research and neurofeedback.
    Open Source
  • BrainFlow Open-source library for acquiring and processing biosignal data from 30+ boards — unified Python, C++, Java, C#, R, and Julia API.
    Open Source
  • Backyard Brains Makes neuroscience accessible with affordable kits for recording EMG from cockroach legs to human muscles — great entry point for bio-signal experimentation.
    Free
  • NeuroTechX Global neurotech community organization — open-source projects, a skills booster program, local chapters, and a Slack community of BCI enthusiasts.
    Community
  • AD8232 Heart Rate Monitor — Analog Devices Official datasheet and application notes for the AD8232 single-lead ECG front-end IC — the go-to chip for DIY ECG projects with Arduino.
    Free
  • MNE-Python The leading open-source Python package for processing MEG, EEG, and iEEG data — includes source localization, time-frequency analysis, and machine learning integration.
    Open Source
  • OpenEEG Project Open-source hardware and software for low-cost EEG recording — schematics, PCB files, and signal processing code freely available for DIY neuroimaging.
    Open Source
  • OpenBCI Documentation Step-by-step guides for setting up Cyton, Ganglion, and Ultracortex boards — from electrode placement to streaming data with Python or GUI.
    Free
  • DishBrain / Biological Neural Networks Paper (arXiv) The landmark 2022 paper on "DishBrain" — cultured cortical neurons learning to play Pong, directly inspiring biological reservoir computing research.
    Research
  • PhysioNet Free repository of physiological data including ECG, EEG, and EMG recordings — the go-to resource for biosignal datasets and open-source signal processing tools.
    Free
🦾

Assistive Technology & AAC

Open tools and standards for augmentative & alternative communication, switch access, and accessibility — building technology that gives people their voice back.

9 resources
  • Open AAC A coalition advancing free and open augmentative & alternative communication — open symbol sets, vocabularies, and tools so AAC is never locked behind a paywall.
    Open Source
  • OpenSymbols A searchable library of freely-licensed communication symbols (ARASAAC, Mulberry, and more) — the visual vocabulary that powers open AAC boards.
    Free
  • ARASAAC The Aragonese Portal of AAC — thousands of free pictograms and ready-made communication materials under Creative Commons, in dozens of languages.
    Free
  • Ace Centre — Open Assistive UK charity building free, open-source AAC and access apps (e.g. switch scanning, eye-gaze keyboards) — code on GitHub and free downloads for families and clinicians.
    Open Source
  • Open Source Assistive Technology A directory and community for openly-licensed assistive-tech projects — 3D-printable aids, switch interfaces, and DIY accessibility hardware you can build at home.
    Community
  • Makers Making Change Connects volunteer makers with people who need assistive devices — a free, open library of vetted, buildable designs including switch-access and AAC hardware.
    Community
  • AAC Language Lab & Core Word Resources Free guidance on core-vocabulary and motor-planning approaches to AAC — the evidence base behind effective communication systems for non-speaking users.
    Free
  • W3C Web Accessibility Initiative (WAI) The authoritative, free guidance for accessible design — WCAG, ARIA, and tutorials so the things we build work for switch users, screen readers, and everyone.
    Free
  • AsTeRICS Framework An open-source construction set for assistive technologies — build custom sensor-to-action access solutions (EMG, head-tracking, switches) without writing code.
    Open Source
🧫

Biocomputing, Organoid Intelligence & 3D Bioprinting

The frontier where living cells, reservoir computing, and bioprinting meet — research papers, open toolkits, and the science behind "wetware".

9 resources
  • DishBrain — In Vitro Neurons Learn Pong (Neuron, 2022) The landmark Cortical Labs paper: cultured human and mouse neurons in a dish learning to play Pong through closed-loop electrical stimulation. The seed of organoid intelligence.
    Research
  • Organoid Intelligence (OI) — Roadmap (Frontiers, 2023) The community paper that defined "organoid intelligence" as a field — a roadmap for biological computing with brain organoids, including ethics and hardware interfaces.
    Research
  • Reservoir Computing — Overview The computing paradigm behind physical and biological "reservoirs": feed signals into a complex dynamical system and train only a simple readout. Foundational for wetware computing.
    Free
  • ReservoirPy An open-source Python library for Echo State Networks and reservoir computing — the easiest way to prototype reservoir models before you wire up a physical substrate.
    Open Source
  • Cortical Labs The team behind DishBrain and the CL1 biological computer — research, the Biological Intelligence Operating System, and ongoing work on neuron-silicon hybrids.
    Research
  • Prof. Oded Shoseyov — Plant-Made Human Collagen Research on recombinant human collagen grown in tobacco plants (CollPlant) — a leading bioink for 3D bioprinting of tissue and implants. Honest background reading on bioprinting feedstock.
    Research
  • CollPlant Bioink Technology How plant-derived recombinant human collagen (rhCollagen) becomes a printable bioink — the materials science behind regenerative 3D bioprinting, explained openly.
    Free
  • MIT — How To Grow (Almost) Anything MIT's open bio-fabrication course materials — synthetic biology, tissue engineering, and bio-printing techniques shared in the spirit of the Fab Academy.
    Course
  • Awesome Biocomputing & DNA Storage A curated list of open tools, papers, and projects across molecular computing, DNA data storage, and living materials — a map of the whole emerging field.
    Open Source
🎵

Audio, DSP & Generative Music

Synthesis, signal processing, soundscapes, and electronic-music production — the open tools and free knowledge behind body-driven and generative audio.

11 resources
  • musicdsp.org The classic community archive of audio DSP code snippets and algorithms — filters, oscillators, reverbs, and effects, copy-pasteable into your own synth engine.
    Community
  • The Scientist & Engineer's Guide to DSP Steven Smith's complete digital signal processing textbook — FFT, filters, convolution, and audio processing — free to read online, chapter by chapter.
    Book
  • Julius O. Smith — Stanford CCRMA Books Four full free online books on physical audio signal processing, spectral audio, filters, and mathematics of the DFT — the gold standard for audio DSP theory.
    Book
  • SuperCollider Open-source platform for audio synthesis and algorithmic composition — a real-time engine plus a programming language, ideal for generative and reactive music.
    Open Source
  • Pure Data (Pd) Miller Puckette's free visual programming language for real-time audio and multimedia — patch synths, effects, and interactive sound without writing code.
    Open Source
  • Sonic Pi Free live-coding music environment — write code that makes beats, melodies, and soundscapes in real time. A joyful way to learn synthesis and generative music.
    Open Source
  • VCV Rack A free, open-source virtual modular synthesizer — patch hundreds of modules to build any synth or generative sound system, no hardware required.
    Open Source
  • Ableton Learning Synths & Music Ableton's free, beautifully interactive in-browser lessons on synthesis and on making electronic music — no DAW or signup needed. The best free intro to EDM production.
    Free
  • BandLab / free browser DAWs Free, full-featured browser-based digital audio workstations for producing tracks — multitrack recording, loops, and effects with no upfront cost.
    Free
  • Freesound A vast collaborative database of Creative-Commons sound samples and field recordings — raw material for soundscapes, ambient music, and sample-based production.
    Free
  • librosa The standard open-source Python library for music and audio analysis — pitch, onset, beat, and chroma detection. The toolkit behind real-time instrument-teaching apps.
    Open Source
💙

Mental Health & EMDR Self-Help

Educational resources for trauma-informed self-care, EMDR, and mindfulness. These are learning tools — not a substitute for professional therapy.

10 resources
If you are in crisis right now, please reach out immediately. Israel: ERAN 1201 (24/7 emotional support, free). International: findahelpline.com. These resources are for education and self-regulation support — they are not a replacement for licensed mental health care.
  • EMDRIA — EMDR International Association The professional body for EMDR therapy — find a certified therapist, read clinical research, and understand what EMDR treatment actually involves.
    Free
  • EMDR Institute Founded by Francine Shapiro, the inventor of EMDR — history, research summaries, and a therapist locator. The original source on the method.
    Free
  • Headspace — Free Basics Guided mindfulness meditation — the free tier includes foundational breathing, sleep, and focus sessions suitable for trauma-aware stress reduction.
    Free
  • VA National Center for PTSD — EMDR Overview Authoritative, evidence-based overview of EMDR for PTSD from the US Department of Veterans Affairs — clear, non-clinical language, links to research.
    Free
  • Therapist Aid Free therapist-created worksheets, tools, and psychoeducation handouts for CBT, DBT, mindfulness, and trauma processing — freely downloadable.
    Free
  • Get Self Help — EMDR Self-Help Resources UK CBT therapist Carol Vivyan's collection of self-help resources including EMDR information, trauma worksheets, and grounding techniques.
    Free
  • Pocket CBT Free cognitive-behavioral therapy thought records and mood tracking — structured CBT exercises you can do without a therapist for everyday mood management.
    Free
  • Insight Timer The world's largest free meditation app — 150,000+ free guided meditations including trauma-sensitive, sleep, and anxiety tracks.
    Free
  • Trauma-Informed Ontario (open resources) Evidence-based trauma-informed care guides, free training modules, and self-assessment tools — applicable globally, not just Ontario.
    Free
🌱

Agriculture / Permaculture / Sustainability

Open-source tools, guides, and communities for growing food, designing resilient systems, and farming smarter.

12 resources
  • OpenFarm Free, open crop-growing database with community-contributed guides for thousands of varieties — companion planting, spacing, watering, and harvest info.
    Open Source
  • FarmBot Fully open-source CNC farming robot for raised beds — hardware designs, firmware, and web app all open, with a growing community and documentation.
    Open Source
  • Open Source Ecology The Global Village Construction Set — open-source blueprints for 50 industrial machines (tractor, CEB press, sawmill) that can be built for a fraction of commercial cost.
    Open Source
  • Permaculture Research Institute Articles, case studies, and resources on permaculture design from around the world — food forests, water harvesting, soil regeneration, and more.
    Free
  • Aquaponics Association Non-profit promoting sustainable aquaponics — free guides, forums, and resources for setting up combined fish-and-plant growing systems at any scale.
    Community
  • Bokashi Composting Guide — Purdue Extension Free research-backed guide to bokashi fermentation composting — fermenting kitchen waste with effective microorganisms for rapid, odour-free soil amendment.
    Free
  • Hydroponics.net Resource hub for hydroponic and aeroponic growing — system comparisons, nutrient guides, lighting calculators, and beginner walkthroughs.
    Free
  • USDA Web Soil Survey USDA's free Web Soil Survey — map and analyze soil properties for any location in the US. The gold standard for understanding your land's growing potential.
    Free
  • Food Forest Abundance Design resources for food forest and edible garden systems — plant databases, companion planting guides, and community design examples.
    Free
  • Growstuff Open-source food gardening community and data platform — track your crops, share harvests, and access an API of community-sourced growing data.
    Open Source
  • Low-Tech Magazine Solar-powered website exploring low-tech, sustainable solutions to modern problems — food, energy, transport, and construction from a deeply researched perspective.
    Free
🖨️

3D Printing & CAD

Design, slice, and print anything — from basic parts to complex mechanisms. All tools listed are free or open-source.

11 resources
  • Thingiverse MakerBot's massive free model repository — millions of user-contributed 3D printable objects under Creative Commons. The first stop for finding printable parts.
    Free
  • Printables (Prusa) Prusa's model sharing platform — cleaner than Thingiverse, strong community, reward points for uploads, excellent search and filtering.
    Free
  • FreeCAD Powerful open-source parametric 3D CAD modeler for mechanical engineering — STEP/IGES import/export, FEM analysis, path workbench. Completely free.
    Open Source
  • Blender The world's leading open-source 3D creation suite — modeling, sculpting, animation, rendering, and video editing. Free forever, GPU-accelerated rendering.
    Open Source
  • Onshape (Education / Free) Professional browser-based CAD, free for education and makers creating public designs — full parametric modeling with real-time collaboration.
    Free
  • OpenSCAD Programmer's CAD — describe 3D shapes with code rather than a mouse. Perfect for parametric, reproducible, version-controlled hardware designs.
    Open Source
  • UltiMaker Cura Leading open-source slicer software — converts 3D models to G-code, supports hundreds of printers, and has a huge plugin ecosystem.
    Open Source
  • PrusaSlicer Feature-rich open-source slicer based on Slic3r — excellent support generation, variable layer height, multi-material, and Prusa/Bambu/Voron profiles.
    Open Source
  • MakerWorld (Bambu Lab) Bambu Lab's model sharing platform with optimized print profiles — growing rapidly with high-quality, well-tested community models.
    Free
  • RepRap Wiki The original self-replicating open-source 3D printer project — design files, firmware, and extensive wiki that started the desktop 3D printing revolution.
    Open Source
  • All3DP Independent 3D printing news and reviews — printer comparisons, filament guides, slicer tutorials, and in-depth how-to articles. Free to read.
    Free
🤖

Robotics, Drones & Sensing

Educational and research-framed resources for robotics, autonomous flight, and detection science — RF, acoustic, optical, and fiber-optic sensing. For research, education, and creative projects only.

13 resources
  • ROS — Robot Operating System The open-source robotics middleware used by researchers and industry worldwide — sensor fusion, navigation, manipulation, simulation. ROS 2 is the current generation.
    Open Source
  • ArduPilot Trusted open-source autopilot platform for fixed-wing, multirotor, rover, and submarine — used by researchers, educators, and professionals worldwide for autonomous vehicle research.
    Open Source
  • PX4 Autopilot Professional-grade open-source flight control software — used by universities, research labs, and startups for autonomous vehicle research and prototyping.
    Open Source
  • Gazebo Sim Open-source robot simulator with accurate physics, sensor simulation, and ROS integration — test and iterate on robot algorithms safely in simulation.
    Open Source
  • DIY Drones Community Pioneering community for amateur UAV builders — forums, build logs, and documentation from the early ArduPilot days, a historical archive of open drone development.
    Community
  • Gymnasium (OpenAI Gym fork) Standard API for reinforcement learning environments — thousands of environments for training robot control policies, maintained by the Farama Foundation.
    Open Source
  • AirSim (Microsoft) Open-source aerial and ground vehicle simulator built on Unreal Engine — photorealistic environments for training autonomous navigation algorithms.
    Open Source
  • CMU Robotics Academy Carnegie Mellon University's free robotics curriculum — sensors, programming, kinematics, and computer vision explained for students and educators.
    Course
  • Modern Robotics (Northwestern) Kevin Lynch's free, rigorous course and textbook on robot mechanics, planning, and control — configuration space, kinematics, dynamics, and motion planning, with video lectures.
    Free
  • LearnOpenCV In-depth tutorials on computer vision with OpenCV and deep learning — detection, tracking, pose estimation, and YOLO applications for edge devices.
    Free
  • ROS 2 Documentation Official ROS 2 documentation — tutorials, concept guides, API references, and migration guides from ROS 1. The rolling distro tracks the latest features.
    Free
  • Distributed Acoustic Sensing (Fiber Optics) How a single optical fiber becomes thousands of vibration sensors — the physics of fiber-optic and optical detection used for perimeter and infrastructure monitoring.
    Research
  • Micro-Doppler & Drone Detection Science The signal-processing principle behind distinguishing a drone's spinning rotors from birds — a research-level entry point into multi-sensor (RF/acoustic/optical) detection.
    Research
💻

Programming Foundations

Free, high-quality resources for learning to code — from your very first line to production-ready software engineering skills.

13 resources
  • freeCodeCamp Completely free, self-paced curriculum covering web development, JavaScript, Python, data analysis, machine learning, and more — with earned certifications.
    Free
  • The Odin Project Full-stack web development curriculum built by and for learners — project-based, open-source, covers HTML/CSS, JavaScript, Ruby on Rails, and Node.js.
    Open Source
  • MDN Web Docs Mozilla's authoritative reference for HTML, CSS, and JavaScript — the gold standard documentation every web developer bookmarks. Completely free and open.
    Free
  • Harvard CS50 Harvard's Introduction to Computer Science — the most popular MOOC in history. Covers C, Python, SQL, HTML/CSS/JS, and problem-solving. Completely free on edX.
    Course
  • Python Official Documentation The complete Python 3 reference, tutorial, and library documentation — including the official beginner's guide, language reference, and standard library.
    Free
  • Real Python High-quality Python tutorials from beginner to advanced — web scraping, APIs, data science, async, testing, and Django. Many articles are free.
    Free
  • MIT OCW 6.0001 — Intro to CS with Python MIT OpenCourseWare version of MIT's foundational CS course — full lecture videos, problem sets, and exams freely available with no registration required.
    Course
  • Pro Git Book The complete, definitive free book on Git — version control fundamentals, branching strategies, rebasing, and advanced internals. Free online and downloadable.
    Free
  • Exercism Practice programming in 65+ languages with community-mentored code feedback — structured tracks for Python, JavaScript, Rust, Go, and many more.
    Free
  • Codecademy (Free Tier) Interactive coding lessons in Python, JavaScript, SQL, and more — browser-based editor, no setup needed, solid free tier for beginners.
    Free
  • roadmap.sh Community-built learning roadmaps for frontend, backend, DevOps, AI, and more — visual, interactive paths showing what to learn and in what order.
    Open Source
  • MIT — The Missing Semester of Your CS Education MIT lectures on practical tools that CS courses skip — shell, Vim, Git, debugging, profiling, security, and more. Short, dense, and extremely useful.
    Course
  • The Rust Programming Language Book Free official book for learning Rust — memory safety, ownership, concurrency, and systems programming. The embedded systems future is trending toward Rust.
    Free
🌍

Open Knowledge & Essential Tools

The pillars of the open internet — free knowledge, open data, and the infrastructure that keeps information free.

13 resources
  • Wikipedia The world's largest free encyclopaedia — 60+ million articles in 300+ languages, written and edited by volunteers. CC BY-SA licensed. Donate if you can.
    Free
  • Internet Archive / Wayback Machine Non-profit digital library preserving the entire web, millions of books, music, films, and software. Access archived versions of any page, or download public domain media.
    Free
  • Project Gutenberg Over 70,000 free public domain ebooks — classic literature, science texts, and historical documents in formats readable on any device.
    Free
  • OpenStreetMap The Wikipedia of maps — free, editable, open geographic data contributed by millions. Data downloadable for offline use, navigation, and analysis.
    Open Source
  • Creative Commons The licensing framework that makes open culture possible — free to use CC licenses, CC Search for finding openly licensed media, and educational resources.
    Free
  • Open Source Initiative (OSI) The stewards of the Open Source Definition — license approvals, advocacy, and the definitive resource for understanding what "open source" actually means legally.
    Open Source
  • Khan Academy Free, world-class education for anyone — math from arithmetic to calculus, science, history, economics, computing, and more. Fully free, no ads, non-profit.
    Free
  • arXiv Free preprint server for physics, math, CS, biology, economics, and more — access cutting-edge research before journal publication. Cornell-operated, open access.
    Research
  • GitHub (free tier) The world's largest open-source code host — unlimited public repositories, Actions CI/CD, GitHub Pages, and Copilot on the free tier. Where open source lives.
    Free
  • Stack Overflow The definitive Q&A site for programmers — 50+ million questions answered since 2008, CC-licensed answers, and a new AI assistant layer.
    Community
  • Wolfram Alpha Computational knowledge engine — solves math, interprets data, looks up scientific constants, and generates step-by-step explanations. Free tier is very generous.
    Free
  • Wikidata Free, open knowledge base with structured data about everything — the machine-readable backbone of Wikipedia, CC0 licensed, queryable via SPARQL.
    Open Source
  • MIT OpenCourseWare Free lecture notes, exams, and video from 2,500+ MIT courses across all departments — engineering, science, humanities, and management. No registration required.
    Free

לזכרה של עלמה ז״ל — iddoperez.ai

This library is dedicated to keeping knowledge open and free — in the spirit of Alma, who believed in the power of learning and the importance of sharing what we know. alma.iddoperez.ai