KlayGE is a cross-platform open source game engine
Cross-platform 2D and 3D game engine
A cross-platform 2D game engine
Super Nintendo (SNES) emulator focused on performance, features
Clojure in Unity
A fast, scalable, distributed game server engine/framework for C++
Character animation system for games and simulations.
Turn based free strategy game about colonizing Mars.
Simple, open-source 2D graphics for everyone
Mesen is a cross-platform (Windows & Linux) NES/Famicom emulator
A funny game for a good company similar to karaoke
A lightweight, fast and extensible game server for Minecraft
Open-source, cross-platform, game-development tools
Example code for creating a 2D platform game in Java.
Embeddable scripting runtime for live behavior, AI, and automation.
Legandary Story of the Zarakite
Ping-Pong-like game in Assembly that works without OS
A platform for Artificial Intelligence experimentation on Minecraft
It is a Brick breaking game with lots of cool features.
Real-time RPG for PC/tablet/phone; multiple quests and random dungeons
Blueshift is a cross-platform 3D game engine implemented in C++
Test project with a 2D platform game developing in Godot 3.1
A step-by-step guide to implementing SSAO for 3D games
Low-latency, high quality voice chat for gamers