Glimmer - Fast and light-weight UI components for the web
Incoming Feedback by Hotjar - Instant visual feedback for your website or app!
Svelte - Cybernetically enhanced web apps
Customer Feedback Portal - Ask customers what you should build next
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
Feedback Fish - Collect feedback & make your customers happy.