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                       There are lots of module patterns for [web browser](http://www.adequatelygood.com/2010/3/JavaScript-Module-Pattern-In-Depth) and [on the server](http://nodejs.org/api/modules.html). Some of them get very complicated. The ones shown here are what I consider to be the simplest to understand.
                       
+                      ### Some Libraries in github to manage/avoid callback hell                      
+                      <ul>
+                      <li><a href="http://github.com/caolan/async" target="_blank">async</a></li>
+                      <li><a href="http://github.com/luciotato/waitfor" target="_blank">wait.for</a></li>
+                      <li><a href="http://github.com/laverdet/node-fibers" target="_blank">Fibers</a></li>
+                      <li><a href="http://github.com/FuturesJS/FuturesJS" target="_blank">future-JS</a></li>
+                      <li><a href="http://github.com/willconant/flow-js" target="_blank">flow-js</a></li>
+                      <li><a href="http://github.com/isaacs/slide-flow-control" target="_blank">Slide</a></li>
+                      <li><a href="http://github.com/bentomas/node-continuables" target="_blank">node-continuables</a></li>
+                      <li><a href="http://github.com/creationix/step" target="_blank">Step</a></li>
+                      <li><a href="http://github.com/fjakobs/async.js" target="_blank">async.js</a></li>
+                      <li><a href="http://github.com/masylum/funk" target="_blank">funk</a></li>
+                      <li><a href="http://github.com/alexkwolfe/groupie" target="_blank">groupie</a></li>
+                      <li><a href="http://github.com/shimondoodkin/node-inflow" target="_blank">node-inflow</a></li>
+                      </ul>
+
                       ### Additional reading
                       
                       - [A pattern for decoupling DOM events from @dkastner](https://gist.github.com/3392235)