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.
Countdown Screensaver - A Mac screensaver for counting down to a date 🖥🕐
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Countdown to Inbox Zero - Always respond on time
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Free time calculator - How much free time do you have remaining?