Klokki for Mac - Rule-based automatic time-tracking
Timing - Timing is the best way to keep track of the time you spend with your Mac.
Time Tracking for Freelancers - A simple, fully integrated time tracker for freelancers
Time 2 - Stay focused and crush procrastination
Forest App - Forest is an app that helps you stay focused on the important things in life.
Gone - An ephemeral to-do list