WHMCS - WHMCS is an all-in-one client management, billing & support system for online businesses.
WiseTime - Web-based automatic time tracking software
HostBill - HostBill is a powerful and flexible, all-in-one automation, billing, client management and support platform for online businesses.
OutlookTime - OutlookTime is a time tracking system that turns Outlook into a timesheet system.
Blesta - Blesta is professional client management, billing, and support software.
Minutes - Minutes - Automatic efficient time tracking and time accounting software for lawfirms