Acid Freecell is an advanced Solitaire clone with both grayscale and hi-res color support. OS 5 users can enjoy full-color built-in and custom backgrounds, transparent cards, and more.
Note that all hi-res resources are included, even for use on low-res devices as a single PRC application. As such, a relatively large amount of free memory is required for grayscale play.
Also, there is no current way to register this game so if anyone can crack it or makes a key generator the game only has 12 or 13 days of unregistered play