Sveinbjorn Thordarson
AppHack
FreeChange property lists and icons of any app.
Mac
Vox Machina
Freespeech synthesizer which can save speech as MP3 or AIFF
Mac
Sloth
FreeLists open files on your system and the applications using them.
Mac
Platypus
FreeCreate Mac OS X apps from scripts.
Mac
Tapir
Paidcreate global menu items that display command output
Mac