Time 2 - Stay focused and crush procrastination

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.

Time Tracking for Freelancers - A simple, fully integrated time tracker for freelancers

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Timing - Timing is the best way to keep track of the time you spend with your Mac.

Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.