Easy User Test - Easy User Test is a user testing tool that offers the easiest way to test your text and design.
Twitter Polls - Polls embedded in tweets
Useberry - User testing feedback and rich analytics in minutes
Simple Poll - The easiest way to create polls in Slack
Peek by UserTesting - Get a free, 5-minute video of someone using your site
Curious Polls - Answer a question once a day for the chance to win £100/$100