Universal JavaScript Module, supports AMD (RequireJS), Node.js, and the browser.

universal-module.js

// Define a global define() that works in the current environment
(function(global) {

    var define;
    
    define = global.define;
    
    // If AMD, just use existing global.define
    if(!(typeof define === 'function' && define.amd)) {
        
        if(typeof require === 'function' && typeof module !== 'undefined' && module.exports) {
            //CommonJS
            define = function(deps, factory) {
                module.exports = factory.apply(this, deps.map(require));
            };
            
        } else {
            //Browser (regular script tag)
            define = function(name, deps, factory){
                var d, i = 0, old = global[name], mod;

                while(d = deps[i]){
                    deps[i++] = this[d];
                }

                global[name] = mod = factory.apply(global, deps);

                mod.noConflict = function(){
                    global[name] = old;
                    return mod;
                };
            };
        }
    }
    
    global.define = define;
    
})(this);