Dudle - Dudle is an online scheduling application, which is free and open source.
FinancialForce HCM - FinancialForce.com provides cloud back-office applications for Salesforce CRM.
Pulse 24/7 - Booking & scheduling mobile app for service providers
Vibe HCM - Vibe HCM is a recruiting and employee engagement platform.
MakePlans - Online appointment booking - MakePlans
BMC Remedy - IT Service Management Suite