Zimbra - Zimbra is trusted by over 500 million users to increase productivity with a complete set of collaboration tools while maintaining total control over security and privacy.
Workday - Workday is an on‑demand financial management and human capital management software solution.
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
BambooHR - Personalized HR software for SMBs
Kolab Community - Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.
Paychex Flex - Paychex Flex is a tool that reduces the complexity and risk of running your own payroll while ensuring greater accuracy with-up-to-date tax rates and regulatory information.