FreeCell - a solitaire card game that is now bundled with Windows
In the June 1968 edition of Scientific American, Martin Gardner described in his "Mathematical Games" column a game by C. L. Baker that is similar to FreeCell, except that cards on the tableau are built by suit rather than by alternate colors.
Win32s included an implementation of the card game FreeCell as an example application, a couple of years before the game became famous with its inclusion in Windows 95.