dapulse - Lead by showing your team the Big Picture. Get everyone working together on what's important.
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.
Nintex - Cloud-based digital workflow management automation platform
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
Bizagi - Bizagi is a Business Process Management (BPMS) solution for faster and flexible process automation. It's powerful yet intuitive BPM Suite is designed to make your business more agile.
mailcow - An open source mailserver suite.