Rixstep

Free
AWSBrowser is a component of the ACP Web Services.
Free
A two-player game where your object is to get five of your pieces in a row

XX

Free
XX transforms files through a predefined succession of 'find/replace' commands
Free
Rixicons extracts associated icons and tests the NSWorkspace methods

S3

Free
Spam crawlers can't understand numeric escapes, making it easy to fool them.
Free
Outbox doesn't make you chase your messages around.
Free
Find Unicode characters on OS X, with 256 pages of 16x16 matrices.
Powerful database app for OS X, with forms, reports, scripting, and more.
Free
Xattrib provides comprehensive and thorough file info for OS X...
Free
Xstat allows users to control all editable fields of the stat structure at once, including file owner, group, mode, flags, and 4 time stamps.
Free
ACP framework provides RxDefaults facility to control apps: listed in Info.plist & registered on startup.
Free
Lightman keeps track of running Cocoa applications, allowing users to "Force Quit" or take more drastic measures to stop them.
Free
Forker combines data forks into data and resource forks to protect from accidental damage.
Free
SPX 35-step Gutmann engine shreds entire hard drive for ultimate data protection.

BBC

Free
Data hidden in hard drives can cause problems like iTunes not syncing iPods, wrong apps opening files, or trojans masquerading as text files.
Developed by Rixstep