Squirrel (programming language) - Squirrel is a high level imperative, object-oriented programming language, designed to be a light-weight scripting language that fits in the size, memory bandwidth, and real-time requirements of applications like video games.

JavaScript - Lightweight, interpreted, object-oriented language with first-class functions

Qt - Powerful, flexible and easy to use, Qt will help you not only meet your tight deadline, but also reduce the maintainable code by an astonishing percentage.

LIPS Scheme - Scheme based powerful lisp interpreter written in JavaScript

CKEditor - Real-time collaborative future-ready rich text editor

Lua - Powerful, fast, lightweight, embeddable scripting language