Star Control Series

Precursors
Star Control 2 inspired music including re-makes of the old songs as well as totally different versions and brand new songs.
http://www.medievalfuture.com/precursors/

Star Control for the Sega Genesis: Extended Reference
Covers controls, ships, weapons, worlds, facilities, and tactics.
http://ledmeister.com/scgenxr.htm

Star Control II Super Melee: Extended Reference
Describes controls, planets, ships, and projectiles.
http://ledmeister.com/supmeler.htm

Star Control: Timewarp
Open source clone/sequel to Star Control II.
http://timewarp.sourceforge.net/

Star Control X
Star Control II Melee clone in written in Qbasic.
http://www.luis.net/personal/starconx/

TW-Light
An open source clone/sequel to the Star Control II. General information, development team, downloads, wiki, and discussion forum.
http://tw-light.berlios.de/

The Ur-Quan Masters
Multi-platform Open Source port of the classic sci-fi game Star Control II, based on the original source code of the 3DO version, with new features including network play and remixed music.
http://sc2.sourceforge.net/