Effortless - Stay focused and beat procrastination on your Mac.
Toggl - Toggl is an online time tracking tool. It features 1-click time tracking and helps you see where your time goes. Free and paid versions are available.
Strides - Track all your goals & habits in one place, with flexible reminders to hold yourself...
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Momentum - Agile goal and performance management
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.