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Free coding curriculum with certifications

Open-source learning management system for 300M+ learners

Creative coding library for artists, designers, and beginners

Naked blogging platform for minimalists

Free, open-source chess server powering millions of games daily

Open-source factory-building tower defense game

Open-source voxel game engine — build your own block worlds

Open-source transport tycoon simulation

Open-source multiplayer RPG inspired by Cube World

Open-source kart racer with online multiplayer

Open-source turn-based strategy with fantasy setting

Minimalist, federated blogging platform

Independent publishing platform for creators

Self-hosted read-it-later app — save and classify articles

Powerful spaced repetition flashcards — remember anything

Free code practice and mentoring across 70+ languages

Privacy-first knowledge management and note-taking

Markdown editor built for researchers and academics

Free, open textbook platform for higher education

Infinite canvas whiteboard SDK and app

Free pixel art editor made with Godot Engine

Professional free digital painting application

Free cross-platform music production software

Professional-grade digital audio workstation