Color matching puzzle

hexalate

Color matching puzzle

Hexalate is a color matching game. The goal of the game is to rotate and position the circles so that each touching line matches in color. You rotate circles by right clicking, and you move circles by dragging them. The game stores the positions and rotations of the circles across runs.
Nintendo Entertainment System/Famicom emulator

nestopia

Nintendo Entertainment System/Famicom emulator

Nestopia is a cycle-accurate NES/Famicom emulator. It has a high compatibility rate and support for many peripherals and input devices.
two single player campaigns for Doom-compatible engines

freedoom

two single player campaigns for Doom-compatible engines

The Freedoom project aims to produce three base-game data files (IWADs) for Doom-compatible engines. With it comes the capability to also play the wide range of mods created for Doom by a vibrant community.
MD5 Animation Viewer

darkradiant

Level design toolchain for DOOM3 and The Dark Mod

DarkRadiant is a 3D map and level editor for games based on the idtech4 engines. The software is based on GtkRadiant and focuses on the games DOOM3 and The Dark Mod. Other games based on the same engine, like Quake 4, might be editable too, but are not explicitly supported.
UFO: Alien Invasion -- build your team and stop the aliens

ufoai

UFO: Alien Invasion -- build your team and stop the aliens

UFO: Alien Invasion is a squad-based tactical strategy game in the tradition of the old X-COM PC games. It combines military realism with hard science-fiction and the weirdness of an alien invasion. The carefully constructed turn-based system gives you pin-point control of your squad while maintaining a sense of pace and danger.
Open source clone of Theme Hospital

corsix-th

Open source clone of Theme Hospital

Theme Hospital was a simulation computer game developed by Bullfrog Productions and published by Electronic Arts in 1997, in which the player designs and operates a hospital.