CDN For ALL Your Stuff

Regardless, CSS, Javascript, and so on, you can probably find a reference at this Content Delivery Network: http://cdnjs.com/

LESS Compilers

So if you are using LESS to code your CSS, you must know about these compilers:

For Windows: http://wearekiss.com/simpless

For Mac: http://incident57.com/less/

You can also reference the javascript less.js file in your code from a CDN like: http://cdnjs.cloudflare.com/ajax/libs/less.js/1.3.3/less.min.js

Best 3D Canvas Javascript Library

Threejs is the best library I've seen for drawing 3D objects within the HTML5 Canvas element. The examples shown at http://threejs.org/ are amazing. There's a very nice intro to Three.js at https://learnable.com. You can even make games with it.

FontSquirrel Fonts & Converter

If you ever need to look for monospaced fonts and others, look at FontSquirrel.com

http://www.fontsquirrel.com/fonts/list/style/Monospaced

If you ever need to convert any font file to another, for example ttf to eot, woff, or svg go to

http://www.fontsquirrel.com/tools/webfont-generator

Best Wholesale SMS Provider

The best and most affordable SMS provider I have ever seen. Nexmo. International reach. All inbound SMS are free. Outbound SMS are 0.0071 USD in USA.

What's more impressive is that with their API hitting your server, you can have as many and unique SMS SHORTCODES as you want. They are also integrated into AppFog so that is very cool.

MIT App Inventor

There's a new generation of mobile app programmers and they are using the MIT App Inventor. Here is a story about all this:

http://readwrite.com/2013/05/02/this-is-what-the-next-generation-of-programmers-looks-like