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.
TimeFlip - Human-friendly time tracker
Hours - Boosting productivity through live, virtual co-working.
Trackly - Trackly monitors web pages and tells you when they change. Beautifully!
Futuramo Time Tracker - Futuramo Time Tracker is a time tracking solutions designed for freelancers and teams.
FreshBooks - The ideal accounting software for small business owners.