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.
Booked Scheduler - Booked (formerly phpScheduleIt) is a simple but powerful reserve-anything scheduler.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
Celcat Timetabler - Celcat Timetabler is the complete, state of the art solution for optimising resource utilisation, timetable publication, ad-hoc room booking, attendance tracking, pay claim management...
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.
QReserve - QReserve is a powerful resource booking, lending, showcasing, and reporting platform.