A performance profiler for Minecraft clients, servers, and proxies
Engo is an open-source 2D game engine written in Go
Java Settlers
A Game Similar to Mastermind
Simple java football game
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A Simple Lightweight and opensource tic tac toe game for android
Modern 3D engine and IDE written using C# and C++.
For Android phones and tablets
Data-oriented and data-driven game engine written in Rust
A 2D game engine and level editor
MAME Android Emulator.
A cross-platform 2D game engine
8-bit Graphical API for Java
Planimeter Game Engine 2D - LÖVE-based game engine for Lua
Example code for creating a 2D platform game in Java.
Source code of the chapters of the book 3D Game Development with LWJGL
Easy fine console input/output for java
Play Tute playing card game
A platform for Artificial Intelligence experimentation on Minecraft
a 2D Game Development Framework
Web powered cross-platform 3D, WebXR game engine
Flex roguelike
A Java light, open source first person shooter,with editors.