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.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
SkyBucket - Save and manage all your bookmarks on one board
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
Siimpl Bookmarking - Start collecting and organizing what interests you