Tally.so - The simplest way to create forms, for free.
Twitter Polls - Polls embedded in tweets
Breeze - A project management software that your whole team will actually love using. The easy way to organize, plan and track progress on your projects.
Simple Poll - The easiest way to create polls in Slack
Polls for WhatsApp - Create & share quick polls in your WhatsApp groups
Polls.io - Create simple polls in seconds