Forecell is the grand-father or maybe great grand-father of free cell games.
The wiki entry tells us that Forecells origins may date back to a Scandinavian game called Napoleon in St. Helena.
If you are familiar with 'cell' type cards games, there isn't too much to say about Forecell other than there are four cells, and into each is dealt a card at the beginning of the game.
Cards can only be added to the Tableau when they are one lower and opposite colour.
Big Free cell, EightCell, Free cell, Forecell, Sea Tower, Seven by Four, Six by Four, TwoCell.