Gem Slider is a great puzzle
game (for Pocket PC running WinCE) on a board where your goal is
to remove all the gems from the board. In order to do this you have to slide
stones from sides of the board, and guide them to the jems of the same
variety. Incredible variety of combinations
makes it very entertaining. It is not as simple as it may seem at first
glance, and quite addictive. There are two different modes of play, and
several skill levels. Updates are free.

Gem Slider (WinCE) is the Shareware version. The full version can be purchased by clicking on the "CLICK HERE TO ORDER" button below for around  12.95USD.