Task Coach VS Memory by Timely

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Time 2 - Stay focused and crush procrastination

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

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

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.

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