Nifty - Manage projects, work, and communications in one place.

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!

Intercom on Product Management - The ultimate resource for aspiring product managers

Userbrain - Easy, fast, and affordable user testing for websites and prototypes.

Party Line - Use Slack to manage your projects

userinput.io - Get on-demand feedback for your app, website or idea. Learn how to improve by hearing real opinions.