Process Tamer - Freeware Microsoft Windows utility that monitors the CPU use of applications, alerts when they use too much, and reduces their priority to keep your PC fast.
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.
Big Meter Pro - Big Meter Pro is a utility that monitors the disk and memory of your CPU.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
AMD64 CPU Assistant - AMD64 CPU Assistant
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.