ImageOptim decreases the file size of PNG, JPEG, and GIF images, even those "Saved for Web". It combines OptiPNG, PNGCrush, AdvanceComp, PNGOUT, Jpegoptim + Jpegtran, and Gifsicle for the best possible optimization.
Cube-OSX is an unofficial port of Wouter van Oortmerssen's excellent Cube 3D game and game engine to Mac OS X.
A bookmark manager.
An Ubuntu-based Linux distribution that uses KDE.