Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Event Finda - Find events near you, and all around the world.
Slinky - Your slack links — organized!
Rally by Eventbrite - Find the best local events and rally your friends to join
Lurchr - Saves all your Slack links, so you can focus on work
Event Hunt - Startups and Tech Events Curated By Locals