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.
ZEI° - Revolutionary time tracking device
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Memory by Timely - An intelligent timeline of everything you did in a day.
TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.
Futuramo Time Tracker - Futuramo Time Tracker is a time tracking solutions designed for freelancers and teams.