Феноменально!
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The library and its documentation you can find here: http://parall.ax/products/jspdf

Need to do cryptography in your Web pages? Of course you do. You might even have a real use for it. This library allows you to encrypt data using AES and create hashes to your heart’s desire. So, go out there and encrypt all the datas! http://crypto.stanford.edu/sjcl/

Today I would like to share this introduction to the world of Node.js by Tomislav Capan. I find this post very useful and interesting: http://www.toptal.com/nodejs/why-the-hell-would-i-use-node-js