Scorched Earth

Scorched 3D
A Windows and Unix clone. Offers news, downloads, and screenshots.
http://www.scorched3d.co.uk/

Scorched Earth: The Mother of All Games
Official site presents FAQ, download, and news.
http://scorch.classicgaming.gamespy.com/

Wikipedia: Scorched 3D
Includes game description and gameplay information.
http://en.wikipedia.org/wiki/Scorched_3D

Wikipedia: Scorched Earth
Includes version information, game description, and some history.
http://en.wikipedia.org/wiki/Scorched_Earth_%28computer_game%29

XScorch
A clone that runs on Linux.
http://chaos2.org/xscorch/