IKNetworkActivityManager is a Cocoa class that simplifies work with UIApplication network activity indicator. It turns your networkActivityIndicatorVisible = YES/NO code to add/removeNetworkUser:, so you don't need to remember objects that can use network anymore. A demonstration App is available.
Escale is a Newton Connection Utility for Mac OS X. It features AddressBook synchronization, package installation, and the use of the Mac Keyboard to echo letters on the Newton. It can connect to a Newton via the serial line, AppleTalk, and TCP/IP with Rendezvous. Escale comes with the full source code of the Desktop Connection Library (DCL).
QuickStep is a fast, simple image viewer. It can read JPG, PNG, GIF, and TIFF images. It can locate and display images of those types within ZIP, RAR, and TAR archives. QuickStep can be started from the Finder but is also designed to work well when started from a terminal. It is keyboard friendly: most commands use single keystrokes instead of Command-key combinations. It can display images fullscreen and run a slideshow.
retainCounter is an application that converts a simple [object release] into a NSLog(@"object retainCount: %i",[object retainCount]); [object release]; command. This is sometimes useful if developers wish to know the current count of an object before it is released, which makes it easier to detect memory leaks.
iTramp is a small personal accounting application. It presently supports multiple accounts, transaction types (cheque, CB, etc.), categories and sub-categories, transfer between accounts, a scheduler to save periodic transactions, basic search and statistics functions, and QIF import.