Zonora Solitaire Games
Offers a large collection of solitaire games to download and play, including variations like Freecell, Klondike, Spider, Yukon, Canfield and Forty Thieves.

Thieves and Kings
Solitaire games for your desktop computer and handheld PC.

Super Solitare
Solitaire game by Handmark, Inc. This program offers 15 of the most popular solitaire games in one package: aces high, eight off, forty thieves, free cell, golf, Klondike, Montana, poker square, pyramid, and spiderette. Mac OS, Windows.