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FocusCommit's answer:
The first Windows app that combine GTD + Pomodoro Timer + Personal Kanban
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Pomofocus - A simple and customizable pomodoro timer for the web
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.
Pomodone - Pomodone is the easiest way to track your workflow using Pomodoro technique, on top of your current task management service.
focus booster - focus booster is a simple timer application following the 'Pomodoro technique' for time...
TimeCamp - Simple and robust time tracking app to help you stay on the same page with your team while working from home.