Live Reacting - LiveReacting is a platform to launch interactive streams on Facebook, Youtube and Twitch.
Twitter Polls - Polls embedded in tweets
Simple Poll - The easiest way to create polls in Slack
Curious Polls - Answer a question once a day for the chance to win £100/$100
Couper.io - couper.io - made by Sevenval
minipoll - Create simple shareable polls in seconds