a free / freeware open source tool for 2-D game development. It is designed for the Windows 9x/DirectX platform, and targeted at people spanning a range of skill levels.
a 2D fighting game in the same style as Double Dragon and TMNT. Paintown is very extensible and comes with editors to help design new levels and animations.
remaking the classic 1984 arcade game Marble Madness by Atari. The graphics are slightly enhanced to bring them on par with modern standards: there is now a full 3D mode in addition to the usual isometric perspective one
concept created by lone developer (Eskil Steenberg) bent on creating an entire massively multiplayer online world single-handedly, using procedural generation techniques that cause the game to build itself by starting with clever rules and exploring them
a complete development utility for graphics of tile-based games. The application contains a bitmap editor for creating tiles and sprites and a map editor for designing level maps.
a general purpose tile map editor. It's built to be easy to use, yet capable of catering to a host of varying game engines, whether your game is an RPG, platformer or Breakout clone.