Twitter Polls - Polls embedded in tweets
Ferendum - Ferendum is one of the top-notch utilities that has been making it easy for you to create polls that can be shared with everyone with people to get views and suggestions with real-time support.
Simple Poll - The easiest way to create polls in Slack
Fast Poll - Create instant, real-time polls for free
Curious Polls - Answer a question once a day for the chance to win £100/$100
poll.ly - your perfect partner to gather ideas and opinions in real time