Sopwith

Dave Clark's Sopwith
Contains game information, links and downloads of his latest version both as executable and source.
http://www.davidlclark.com/sopwith/index.html

Falcon's Sopwith Page
Includes information, screenshots, and downloads.
http://sopwith.classicgaming.gamespy.com/

Sopwith 3
A semi-official sequel to/remake of the two original versions of the classic arcade game. Includes download, information, and screenshot.
http://sopwith3.sourceforge.net/