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!
Balsamiq - Balsamiq. Rapid, effective and fun wireframing software.
Hotjar - The #1 Leader in Heatmaps, Recordings, Surveys & More. Sign up for a 15-day free trial and start learning from real user behavior today!
Invision - Prototyping and collaboration for design teams
Validately - Validately is a user feedback platform to test demand and usability on a clickable prototype or live feature.
Zeplin - Collaboration app for UI designers & frontend developers