Jinja2 - Jinja2 is a template engine written in Python.
mustache - Mustache is a simple web template system with implementations available for ActionScript, C++...
Handlebars - Handlebars is a JavaScript template library that is, more or less, based on ...
Pug - Pug is a robust, elegant, feature rich template engine for Node.js
Typescript - TypeScript allows developers to compile a superset of JavaScript to plain JavaScript on any browser, host, or operating system.
Apache Velocity - Velocity is a Java-based template engine.