A simple telnet (and possibly SSH) server
Pygrid is an open-source and cross-platform pygame/python 2D engine.
The Flixel Power Tools are a set of plug-ins for Flixel 2.5+
A GUI based on libSDL for C++ applications
Extremely simple joystick rumble / vibration library
A graphics engine + toolkit.
LibGDX/LWJGL tutorials and examples
Graph editing tool
Create structured binary files from XML data.
A visual editing environment for Sims3 JAZZ resources.
The solution to all your problems
An IRC bot project case study.
Cross platform 2D game creation framework with Python bindings
StarlingPunk is a framework built on top the Starling library
Resource Manager Library for Java Games
C-Lesh is a game programming language for 2D games.
Programming Game, A Practice Tool for Building Intelligent Things