UTest - uTest is the world's largest professional network for software testers and test engineers - 175,000+ QA professionals from more than 200 countries and territories.
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!
Testbirds - Testbirds is a crowdtesting platform with a community of 100,000 testers
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.
test IO - QA platform to test web & mobile apps
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.