Ring4 Meeting - Dead simple video conferencing - free, in browser
Vanilla Forums - Build an engaging community forum using Vanilla's modern cloud forum software.
Stork.ai - AI-Based Collaboration for Hybrid Teams. Rich media messaging, advanced video and voice conferencing, auto-transcribing and screen sharing. Serendipitous meetings at the water-cooler with your human and AI teammates.
Forumbee - Forumbee offers community forums for discussions, feedback and Q&A.
openmeet - Account free video conferencing with a rooms component that lets you use VC within a physical meeting room. The server can also be hosted in your own cloud for extra privacy/security.
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.