Ace Solitaire: Free solitaire game. Compatible with all browsers including WebTV and Worldgate. Does not use Java or Flash technologies.
AceCardGames.com: Offers a number of online solitaire card games. Requires Flash. In Dutch and English.
Clown Card Memory Game: Find the animated clown cards that are the same.
Four Card Solitaire: Includes rules and an online card game. Requires Java.
JSolitaire FreeCell: Java based game that uses the mouse in order to control the cards. Includes the rules of the game, tips and tricks.
Solitaire!Network: 30 online card games. Includes Klondike, Pyramid, Scorpion, Tri-Peaks, Golf, Canfield, FreeCell, and three originals, all playable online.