Wohooo.net - Create Your Own Online Radio Station
Time Sink - Time Sink helps you track how you spend your time on your Mac.
Streampusher - Start your own internet radio station
Anti-Social - Anti-Social is a productivity application for Macs that turns off the social parts of the internet.
Listen2MyRadio - Stop dreaming, start streaming. Free and premium Shoutcast and Icecast audio broadcasting.
Strict Workflow - Enforces the Pomodoro time management technique by blocking distracting sites