GetStream.io - APIs for the development of scalable newsfeeds and chat applications.
Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Geneva - An all-in-one communication app for groups & communities
Zoho Backstage - Plan, run, and analyze your event— all from one place
müteme - A free Zoom mute button for Mac
Meetup for iOS and Android - Discover groups that are all about the things you love