Curious Polls - Answer a question once a day for the chance to win £100/$100
Simple Poll - The easiest way to create polls in Slack
Polls for iMessage - Group Decisions Made Easy. Create polls, vote, and view the results directly in iMessage. The easiest way to make any group decision.
Twitter Polls - Polls embedded in tweets
Twitter Ads - Twitter offers targeted ad placement on their ad platform.
GitHub Polls - Polls for GitHub issues and readme