The Ren'Py Visual Novel Engine
Powerful, mature open-source cross-platform game engine for Python
JavaScript-based game engine designed to empower developers
Simple GTK# Paint Program
Ct.js is a desktop game engine that makes learning programming fun
Cross-platform, open source, and super fast MUD client with scripting
Free game engine for development of desktop, mobile, and web games
Stride (formerly Xenko), a free and open-source cross-platform C# game
Gideros Release version
A fast and reliable entity component system (ECS) and much more
A game framework written with osu! in mind.
3D Engine c++
Online War system for IL-2 Sturmovik and Iron Front in ArmA 2
Free online tool to test and diagnose your game controller instantly.
A fun realistic multiplayer free-and-open-source first-person-shooter!
A GNU/Linux operating system accessible for visually impaired.
GLScene Engine for Delphi & C++Builder VCL Windows 32/64
Delphi Java - VRCalc++ OOSL (Script) and + (Binary Exec Distro)
Action RPG that's easy to mod
A bare-bones Video Poker Game written in JavaScript
Sudoku! Help to solve puzzles. Solve them for you. Generate puzzles.
LIKO-12 is an open source fantasy computer made using LÖVE
2D Game Engine with Lua Scripting made on top of SFML