Clone Hero - Clone Hero is a free rhythm game, which can be played with any 5 or 6 button guitar controller...
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.
Osu - Osu is Music, Rhythm, Single and Multiplayer video game developed by Dean Herbert.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Frets on Fire - Bonus content.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.