PracticePanther - PracticePanther offers CRM, invoicing, time tracking and communication solutions for law firms.
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.
PHC FX - PHC FX is a comprehensive solution that offers a wide range of functionality at any price.
Harvest - Simple time tracking, fast online invoicing, and powerful reporting software. Simplify employee timesheets and billing. Get started for free.
iDempiere - iDempiere Business Suite ERP/CRM/SCM done the community way.
RescueTime - Time management software that shows you how you spend your time & provides tools to help you be more productive.