Glimmer - Fast and light-weight UI components for the web
Svelte - Cybernetically enhanced web apps
Preact.js - Preact is a fast 3kB alternative to React with the same modern API. Components & Virtual DOM.
Inferno - An extremely fast React-like javascript library for building modern user interfaces.
Zepto - World's Simplest AI Powered Cloud-based Data Analytics Tool.
Deku - Functional view library for building UI components as an alternative to React