Twitter Polls - Polls embedded in tweets

Conode - A simple editor to organize meetings

Simple Poll - The easiest way to create polls in Slack

Let's Meetup - An easy way to share POIs and addresses in iMessage

Polls API - Scalable, efficient API to build polls, quizzes, ratings and many more

Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.