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 - [NodeOS](http://node-os.com) - The first operating system powered by npm.
 - [limdu](https://github.com/erelsgl/limdu) - Machine-learning framework.
 - [Cytoscape.js](http://js.cytoscape.org) - Graph theory (a.k.a. network) modeling and analysis.
+- [kad](https://github.com/kadtools/kad) - Kademlia distributed hash table.
 
 
 ### Command-line apps