NANO – jQuery Template Engine - NANO is a simple and open-source jQuery Template Engine developed by trix.pl and released under the MIT License.
mustache - Mustache is a simple web template system with implementations available for ActionScript, C++...
Pug - Pug is a robust, elegant, feature rich template engine for Node.js
Jinja2 - Jinja2 is a template engine written in Python.
Handlebars - Handlebars is a JavaScript template library that is, more or less, based on ...
Eta JS - Application and Data, Languages & Frameworks, and Templating Languages & Extensions