Nextcloud Hub - On-premises, enterprise collaboration solution for documents, emails, calendars and more.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
GreenOrbit - Intranet software with everything you need, built in
draw.io - Online diagramming application
Oak Engage - Oak Engage is a digital workplace for enterprises that need to communicate with their workforce. Connect your teams. Engage your people.
Visio - Simplify and communicate complex information using data-linked diagrams.