Happer - Meet people & participate in activities, happier together
DownToDash - Meet fun people based on activities & discover events!
Hotjar - The #1 Leader in Heatmaps, Recordings, Surveys & More. Sign up for a 15-day free trial and start learning from real user behavior today!
Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.
Upcoming.org - A simple way to share and discover interesting events
ClearFlask - Open-source Product Feedback Tool with a Public Roadmap and Announcements.