AppLaunch is a MacOS X tool written in Objective-C/Cocoa to launch common Unix and MacOS commands using a "graphical command line". You can say that it is the MacOS X version of Windows', KDEs, ... "Run"/"Launch" dialog.
iMan is a graphical man page viewer for Mac OS X. It is written using Apple's Cocoa frameworks and provides an attractive and usable GUI for viewing man pages.
This project is no longer active. Please see the project web site for more information.