Desktop/Android/HTML5/iOS Java game development framework
This software is a particle effect editing tool
LÖVE is an awesome 2D game framework for Lua
Orx: Portable Game Engine
VR Mosaic - C++ Builder Applet v.2.5
TX Library is a tiny graphics library for Win32 written in C++.
Delphi : VRCalc++ OOSL & + (Paged List, TextEditor, VRAstroVision ...)
Free and Open Game Programming Language for Windows and GNU/Linux
Open-source, cross-platform, game-development tools
486 lines of C++: old-school FPS in a weekend
scriptable game engine with built-in support for 2D graphics and sound
2D game creation software
Cross platform 2D game creation framework with Python bindings
easy programming language for 2d games