Jinja2 - Jinja2 is a template engine written in Python.
NANO – jQuery Template Engine - NANO is a simple and open-source jQuery Template Engine developed by trix.pl and released under the MIT License.
Hamlet - Hamlet is an open source reactive templating system.
Pug - Pug is a robust, elegant, feature rich template engine for Node.js
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 ...