RequireJS : RequireJS is a JavaScript file and module loader. It is optimized for in-browser use, but it can be used in other JavaScript environments, like Rhino ...
LokiJS : A fast, in-memory document-oriented datastore for node.js, browser and cordova
SlimerJS : A scriptable browser for Web developers
chromeless : The chromeless project is an experiment into making it possible to build a web browser using only web technologies, like HTML, JavaScript, and CSS.
Chrome Experiments : Google Chrome Experiments is an online showroom of web browser based experiments, interactive programs, and artistic projects.
A JavaScript file you can insert into your pages to simulate the Firebug console in browsers that are not named Firefox.
