Vue.js - Reactive Components for Modern Web Interfaces
Mustache.js - Minimal templating with {{mustaches}} in JavaScript - janl/mustache.js
Polymer - Polymer is a library that uses the latest web technologies to let you create custom HTML elements.
EJS - An open source JavaScript Template library.
Deku - Functional view library for building UI components as an alternative to React
FLAVE - Flave was created to bring ASP.