Mustache.js - Minimal templating with {{mustaches}} in JavaScript - janl/mustache.js
EJS - An open source JavaScript Template library.
XSLT in-browser implementation - XSLT is a cross-browser API for converting XML data into string or virtual DOM implemented natively with multithreaded streaming processing.
Vue.js - Reactive Components for Modern Web Interfaces
Underscore Templates - Underscore.js template function for micro templating.
Json2Html - App to convert JSON into human friendly tabular format.