Traditional, 1996Freeware, Freeware, Freeware
Also known as NOW: A Computer Chess Program
Traditional, 1991Shareware
Traditional, 1985Full version
Traditional, 2000Freeware, FAQ
Also known as Rival Chess
Traditional, 1993Shareware, Source code, Full version
Traditional, 1993Shareware (installed), Shareware
Also known as Virtual Chess
Traditional, 1995Playable demo, Patch