Python - Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java.
Mustache.js - Minimal templating with {{mustaches}} in JavaScript - janl/mustache.js
Rust - A safe, concurrent, practical language
Vash - Vash is a template engine that offers a swift flow between code and content using Razor Syntax
Java - A concurrent, class-based, object-oriented, language specifically designed to have as few implementation dependencies as possible
EJS - An open source JavaScript Template library.