Attendize Event Ticketing - Attendize is a free & open-source ticket selling and event management platform
Omegle - Omegle is one of the most popular online chat website allowing user to communicate with anyone without registration.
Zoho Backstage - Plan, run, and analyze your event— all from one place
Chatrandom - Chatrandom provides medium to users for having chat at random with different users around the globe.
Meetup for iOS and Android - Discover groups that are all about the things you love
LuckyCrush - Live random video chat