Shapr - A completely free way to build your professional network.
EventsBase - Find the best professional events nearby or globally
LetsLunch - Do more with your lunch hour. Meet new people.
Rally by Eventbrite - Find the best local events and rally your friends to join
Wildcard - Discover, connect and meet people at communities
Komos - komos.io is a free tool, that helps you discover comedy events near you and get event tickets for your favourite comics.