NextCloud is an open source collaboration suite which in addition to file sync & share, places your email, calendar, projects and documents in a trusted, self-hosted environment. It is a fork of OwnCloud by the original OwnCloud team, who wanted to create a storage solution that would be 100% AGPL compliant. The original codebase commenced development in 2010. The NextCloud team (formerly OneCloud) has supported respected organizations including CERN, Deutsche Bank, Vodafone and BNP Paribas.
Self-hosted alternative for: Dropbox, Office 365, GSuite, ZOHO Office
Special Features: Video chat, media file streaming, edit documents in real-time