Manage projects and tasks, create proposals and contracts, send invoices and get paid online, collaborate with your clients and team, plus so much more from one initiative and deeply customisable platform.
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.
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Kolab Community - Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.
Creativity 365 - Cross-device content creation suite
iRedMail - A fully fledged, free email server solution, an open source project (GPL v2).
Microsoft Teams - Microsoft Teams provides the enterprise-level security, compliance and management features you expect from Office 365, including broad support for compliance standards, and eDiscovery and legal hold for channels, chats, and files.