Twitter Polls - Polls embedded in tweets

Bumble - Bumble is a social network that allows you to feel empowered while you make those connections, whether you’re dating, looking for friends, or growing your professional network. One first move on Bumble could change your life.

Simple Poll - The easiest way to create polls in Slack

Tinder - Tinder is how people meet. It's like real life, but better.

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

Hinge - Find people you want to date through your friends on Facebook.