Simple Poll - The easiest way to create polls in Slack
Tally.so - The simplest way to create forms, for free.
GitHub Polls - Polls for GitHub issues and readme
Polly.ai - Capture instant feedback on Slack, Teams and Zoom with Polly
Curious Polls - Answer a question once a day for the chance to win £100/$100
Three Cents - Quickly create polls and gather opinions from anyone