Ractive.js is a template-driven UI library, but unlike other tools that generate inert HTML, it transforms your templates into blueprints for apps that are interactive by default.

A rich and powerful templating language for JavaScript.

Plates is a native PHP template system that’s fast, easy to use and easy to extend. It’s inspired by the excellent Twig template engine and tries to bring modern template language functionality to native PHP templates. Plates is designed for developers who prefer to use native PHP templates over compiled templates, such as Twig or Smarty.

Transparency is a minimal template engine for jQuery. It maps JSON objects to DOM elements with zero configuration. Just call .render()

Twig is a modern template engine for PHP

Fast: Twig compiles templates down to plain optimized PHP code. The overhead compared to regular PHP code was reduced to the very minimum.
Secure: Twig has a sandbox mode to evaluate untrusted template code. This allows Twig to be used as a template language for applications where users may modify the template design.
Flexible: Twig is powered by a flexible lexer and parser. This allows the developer to define its own custom tags and filters, and create its own DSL.