Freezer 2 for Mac OS X by Ravuya Aliens are coming to eat everyone's brains! You, our intrepid hero, must therefore put the entire town on ice using the community's deep freezes and large stockpile of assault weaponry.
Glow for Mac OS X by Ravuya Zombie-bashing, light roleplaying action. Improve your character as you descend into a technological hell while using high-tech weapons.
MIDI Keyboard (OSX) by H_o_p_s MIDI Keyboard has been developed so that if there is no hardware MIDI controller attached to your computer you may still be able to have a MIDI input device. Often you can attach to a system default software synth, enabling for realtime playback of music.
Muffins for Mac OS X by Ravuya A Bomberman clone based on speed and bomb-spam rather than skill and strategy. Features interesting art and wacky sound effects.
Sloplifter OSX by Ravuya Entertaining one-button game featuring a flying pig in some demented pseudo-Soviet land, collecting apples and beating down the facist frying pans.
Sudoku Solver (OSX) by Patbert About: Solves most sudokus in less than a second and features open and save, copy and paste, three different themes, and 36 premade sudokus (from easy to evil). Includes source.