The piecepack set is a very versatile set of components that can be used to play over 100 original games. It's also in the Public Domain, so anybody can make and sell piecepack sets and there're also free pdfs that can be printed to make a very inexpensive set:

http://www.boardgamegeek.com/game/2860

Recently I downloaded the game "Sumo" for the palm (a recreation of En Garde which I've never played) and out of curiosity decided to try adapting it for piecepack. It mostly works, and so I got the idea for this list...

Most of the items of this list are games that have already been adapted with links to their piecepack wiki page. The rest are just ideas with small explanations. Feel free to add your own ideas to the list.

By the way, I've tried to avoid the classic abstract games that can be played or adapted for the piecepack (chess, ludo, checkers, etc...):

Enjoy!

Edit: I've reordered the list by names to make it more useful...

Update: The latest piecepack contest, Good Portsmanship ( http://www.ludism.org/ppwiki/GoodPortsmanship ) has brought 14 new games adapted from existing games. Check the link to see all the games. As the rules become available I'll be adding them to this list.