Event Finda - Find events near you, and all around the world.
Google Drive to Slack - Slack notifications whenever you work on Google Drive docs
Rally by Eventbrite - Find the best local events and rally your friends to join
Kissflow - Kissflow is a workflow tool & business process workflow management software to automate your workflow process. Rated #1 cloud workflow software in Google Apps Marketplace.
Event Hunt - Startups and Tech Events Curated By Locals
Heymarket for Slack - Text and Facebook messaging from Slack