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
PollUnit - Create and customize public or anonymous votings, surveys, free tables, idea collections or audio, video and photo contests.
Twitter Polls - Polls embedded in tweets
PollMaker - We Make Publishing Real Simple
Decidr - Make better decisions with quick A/B polls