Track your work in OSX Lion+
Acitvity Tracker is a small menubar application which continuously collects the current active window title and the time the window is active. You can filter, save or export the collection to CSV, XML or HTML files. The application is a useful tool for developers to track the time spent on projects or similar activity.
A lightweight markdown editor for Mac OS X 10.6+
Klingon Dictionary and Analyzer
This application features tlh-en and en-tlh dictionary, and a very basic (yet) klingon words/sentences analyzer. It does also have pretty basic klingon speech synthesis built on Macintalk english phonemes. If you like it, please donate! Visit homepage if you want to make a donation (link below).
A collection of prime-number-related applications.
NCPrime includes a collection of applications for prime number testing and rendering. These programs are mostly developed for fun to learn about different kinds of programming languages and techniques, although they are each fully functional and capable of some very impressive math.