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.
PortableApps.com - PortableApps.com is a website offering many free, commonly used Windows applications that have been...
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
The Portable Freeware Collection - One of the largest collections of free, portable software on the web.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
PStart - PStart is a simple tray tool to start user defined applications.