Bookshare - I'm giving away my books
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.
Shufflebook - Exchange used books locally
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Top Startup Books - A collection of must-read books for startup founders.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.