Freecell 2006 is the highest rated Freecell on the web.

It has a lot of cool features like 3 million Starting positions, Undo, Redo, Undoall, Redoall, Replay Forward and Back, Snapshot, Favorites, Autosave, Adjustable card speed, Game saving, Global and General history, Detailed Scoreboard with Statistics and Top Score, Automatic Game Loading, Possible Moves Display, Fading Background Color Schemes and Color, Sound Schemes, Session and Game timer, View and Export Game source, File association.