Stark - Contrast check and color blindness simulator for Sketch.
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.
President Flip Flops - Going back on your word, one step at a time
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Catch - Catch is the easiest way to use ShowRSS on OS X. It'll take care of everything.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.