Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Donut Slack Bot - Get matched with a new coffee buddy each week in Slack
Zoho Backstage - Plan, run, and analyze your event— all from one place
Tawkify - Remove all dating frustrations & leave it to your matchmaker
Meetup for iOS and Android - Discover groups that are all about the things you love
Double - Tinder for double dates