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Netrix is a free tetris clone which you can play in either single or multiplayer

It can calculates the reliability of difference scores.

It is a screen saver, you can mirror the binary files on your server.

It can run a Screen Saver behind all your icons on your desktop.

Air Video can stream videos in almost any format to your iPhone and iPod touch.

Sonogram can analyze sound files.

It can help you quickly learn and efficiently train your vocabulary.

RepoWatch can track your code repositories.

It can displays Stereoscope content on a real 3D model.

GardenSketch is design software which can help plan and lay out any area.