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.
Priorities - A todo app for today and tomorrow only
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Know Priorities - Product prioritization made better
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
1st things 1st - Strategic prioritizer that helps you make up your mind.