iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
Wordtune - AI-powered writing companion
mailcow - An open source mailserver suite.
Anyword - An AI platform for creating effective marketing copy, trained on tens of millions of successful ads.
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.
Grammarly - Clear, effective, mistake-free writing everywhere you type.