Open-source gold for builders.

A Python and JavaScript engine that converts video into ASCII or pixel-block frames and streams them to an HTML5 Canvas player in real time.

A minimalist Windows desktop sticky-note app with to-do and Markdown note papers that live directly on the desktop, built natively in WPF.

A Windows endpoint security app combining YARA rules, PE machine-learning inference, signature checks, optional cloud analysis, and a kernel minifilter driver.

Luanti (formerly Minetest) is a free open-source voxel game engine for building and playing games with Lua modding.

A team-level memory hub for AI Agents that turns chats, docs, and code into shared, governed memory assets usable across agent frameworks.

Open-source ESP32-based quadcopter flight controller firmware and hardware design, built from general-purpose parts for education and research.

An ESP32 desk display that shows your Claude Code usage limits, with an animated mascot that reacts to prompts and alerts you when a session needs input.

A Chinese-run monthly newsletter and curated list that introduces interesting, beginner-friendly open source projects from GitHub.

Open-source screen recorder and editor for Mac, Windows and Linux that adds zooms, cursor polish and styled frames to demo videos.

A floating desktop reader that keeps local books visible in a screen corner, with a transparent text-only mode for low-distraction reading.

A CLI and agent skill that scans React codebases for state, performance, security, accessibility and maintainability issues.

Open 3D Engine (O3DE), a multi-platform, real-time 3D engine for building games, cinematic 3D worlds and simulations.

OpenToonz is an open-source, full-featured 2D animation software derived from Studio Ghibli's customized Toonz Studio.

A compact, pocket-sized digital camera built on a Raspberry Pi Zero, designed to be 3D printed and assembled from off-the-shelf parts.

A teaching operating system with about 2,000 lines of C and RISC-V assembly, designed so students can read all of its code.

A macOS menu bar app that explains in plain English what each USB-C cable on your Mac can do and why charging may be slow.

A native macOS terminal built on libghostty, with vertical tabs, agent-aware notifications and a scriptable CLI for running AI coding agents in parallel.

Official source code for the Telegram messenger iOS app, with a build system for compiling it yourself in Xcode.

A set of Claude Code skills that walk academic work through research, writing, peer review, revision and finalization, with a human approving each stage.

A hands-on Vibe Coding course that teaches non-programmers and developers to build real AI-assisted products from idea to launch.