Be Focused by XWaveSoft - Simple Pomodoro timer in your Mac's menu bar
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.
Flow - Stop managing projects from your inbox.
Hours - Boosting productivity through live, virtual co-working.
Doropomo - Inverted Pomodoro focused for a truly work/life balance
Futuramo Time Tracker - Futuramo Time Tracker is a time tracking solutions designed for freelancers and teams.