FreelanceStation - Time tracking and Invoicing for Mac. Built for freelancers.
myGeoTracking - Mobile Time Clocking & Job Status with App, Text or Voice Call
Qbserve - Freelance time tracking, invoicing, and productivity improvement
WorkTrail - WorkTrail allows you to keep track of your work in real time.
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.
FieldAware - Field Service Management Software from FieldAware helps mid-size and enterprise businesses streamline field service operations.