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!
Userbrain - Easy, fast, and affordable user testing for websites and prototypes.
UserBob - Provides affordable remote user testing.
userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.
AppKat - Recruit, track, schedule, manage and conduct usability tests, all in one simple, affordable...
PlaybookUX - PlaybookUX is an affordable user testing and interview software that recruits the right participants, schedules, transcribes and analyzes your research.