The latest production of Seattle Omniworks software arm, IJWSoft, has released the freeware game Lemonade Stand. The game which is available from the IJWSoft website (http://ijwsoft.com/lemonade-2/) is playable by up to 10 players and includes player score-keeping right on screen.
This software, in addition to being freely available, is also open source. The program was produced in RealBasic and is available for Mac OS X Intel Based machines, 32 Bit Windows, and Linux as well as Mac Power PC models using Mac OS 10.x .
Be sure to check out the software at http://ijwsoft.com/lemonade-2/