What are some alternatives?
ManicTime - Track your computer usage and use collected data to accurately tag 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.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Project Hamster - Project Hamster is time tracking for individuals.
Qbserve - Freelance time tracking, invoicing, and productivity improvement
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.