Master programming by recreating your favorite technologies from scratch.

A collective list of free APIs

Learn how to design large-scale systems. Prep for the system design interview. Includes Anki flashcards.

Open-source Windows and Office activator featuring HWID, Ohook, TSforge, and Online KMS activation methods, along with advanced troubleshooting.

Stable Diffusion web UI

Get up and running with OpenAI gpt-oss, DeepSeek-R1, Gemma 3 and other models.

Command-line program to download videos from YouTube.com and other video sites

A feature-rich command-line audio/video downloader

The Go programming language

Virtual whiteboard for sketching hand-drawn like diagrams

Empowering everyone to build reliable and efficient software.

An open-source remote desktop application designed for self-hosting, as an alternative to TeamViewer.

Set up a modern web app by running one command.

Vim-fork focused on extensibility and usability

LLM inference in C/C++

Node Version Manager - POSIX-compliant bash script to manage multiple active node.js versions

High performance self-hosted photo and video management solution.

Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one

web development for the rest of us

"The mother of all demo apps" — Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more

Open Source Continuous File Synchronization

For developers, who are building real-time data-driven applications, Redis is the preferred, fastest, and most feature-rich cache, data structure server, and document and vector query engine.

The Moby Project - a collaborative project for the container ecosystem to assemble container-based systems

Dear ImGui: Bloat-free Graphical User interface for C++ with minimal dependencies

OBS Studio - Free and open source software for live streaming and screen recording

Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS

Ansible is a radically simple IT automation platform that makes your applications and systems easier to deploy and maintain. Automate everything from code deployment to network configuration to clo…

Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.

The Prometheus monitoring system and time series database.

A cross-platform, OpenGL terminal emulator.