Poll the People - Poll the People is a leader in pre-live A/B testing.
Polls for WhatsApp - Create & share quick polls in your WhatsApp groups
Curious Polls - Answer a question once a day for the chance to win £100/$100
UserTesting.com - Usability testing has never been easier. Get videos of real people speaking their thoughts as they use websites, mobile apps, prototypes and more!
Twitter Polls - Polls embedded in tweets
Upflowy - Upflowy is a drag and drop no code tool to build and optimize web experiences.