TopTracker - Beautiful, free time tracking
Teamleader - CRM, invoicing & project planning in a single tool for SME's
timeBuzzer - timeBuzzer enables freelancers and project-driven teams to track their time at the touch of a button, understand where their time goes and create reports with just a few clicks.
FreshBooks - The ideal accounting software for small business owners.
Cattr - Cattr is a free open-source self-hosted time tracker with desktop clients for windows, mac, linux.
InvoiceLion.com - Web based open source time management and invoicing software