AtTrack - First modular time tracker to improve team's productivity
Time Sink - Time Sink helps you track how you spend your time on your Mac.
Butleroy - Find time for the things you love
ChatterBlocker - ChatterBlocker is the prime software to reduce the nearby conversation’s distraction that allows you to focus on your work.
TimeTagger - Open source time tracker
Strict Workflow - Enforces the Pomodoro time management technique by blocking distracting sites