Arianne is an engine to develop multiplayer online games like Stendhal
INSTEAD - Simple Text Adventure Interpreter.
SDL based generic 2D game engine
Quake PAK file utility
X3D Prototypes for the SMUOS Component
Portable game engine with main focus on point-and-click adventures
Asphyre is a cross-platform framework for Delphi and FreePascal.
3D .NET engine for Windows, Linux, Mac
A game engine written in the D programming language
Java Gamepad API for multiple platforms
A mobile tower 3D tower defense/defend the flag game
A multiplatform game engine for interactive fiction experiences
C library for manipulating Minecraft world data
Extremely simple joystick rumble / vibration library
Pear3DEngine is a modern and modular 3D development framework
An extensible development framework for roleplay games.
DiaT is a Textadventure
Decodes the login credentials stored by the minecraft launcher
Simple Point & Click Game