List of free user-research stuff for developerππ½
If you're looking for all programming tools around user-research (not just free). Check this page List of user-research Programming Tools

UserLeap
Continuously identify opportunities to acquire and retain more customers. Gain clarity into customer needs and grow your business.
Tag: insight, user-research
Up to 5k monthly tracked visitors Web, iOS, Android, and link microsurvey delivery Unlimited custom attributes and events Full template gallery

Squeaky
Understand exactly how customers are using your website or web app, without invading their privacy.
Tag: ux, analytics, privacy, research, user-research, ux-testing, ui-testing
1000 recordings per month Unlimited team members Unlimited page views Unlimited analytics history Unlimited heatmaps Unlimited customer feedback responses