TimeLog App - The most dead simple and responsive time-tracking platform
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Hours - Boosting productivity through live, virtual co-working.
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.
Freework - An easy way to keep track of your daily work
tinyTimeSheet - A basic time sheet for Mac.