Incoming Feedback by Hotjar - Instant visual feedback for your website or app!
Smaller - Make your websites load faster
Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.
Website Grader - Grade your website's strengths and weaknesses in seconds.
ProductBoard Customer Feedback Portal - Share feature plans and collect feedback at scale for free
Checkbot - Checkbot will boost the SEO, speed and security of your site by checking you're following 50+ web best practices. Browser extension with free and paid plans.