Web Activity Time Tracker - Track your activity in the browser
ManicTime - Track your computer usage and use collected data to accurately tag time.
ActivityWatch - Log what you do on your computer. Simple (yet powerful), extensible, no third parties.
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.
Time Doctor - Time Tracking and Time Management Software that is accurate and helps you to get a lot more done each day.
Azendoo - Azendoo is a collaborative task management solution that helps companies to get work done easily and in teams.