Learn To Build Websites

JS Bin is a free website for learning and experimenting with web languages, in particular HTML, CSS and JavaScript. It is ultimately a code sharing site, so everything you do is public. As you type into one of the editor "panels", you and anyone watching your bin will see the output being generated in real-time in the output panel. A Pro version cost £60 a year for private bins, Dropbox backup and custom URLs. See: http://jsbin.com

Is Your Website Mobile Friendly For Google

Google is putting more emphasis on mobile optimized content in it's search algorithm. To help they've created a quick test: https://www.google.com/webmasters/tools/mobile-friendly/

Host FREE Websites on Microsoft Azure

The Microsoft Azure FREE website tier allows you to host up to 10 unique websites with a combined total of 1GB of disk space and a maximum daily bandwidth of 165MB a day. Supports a wide variety of content management systems including Apache, Drupal, HTML5, Joomla, Magento, Node JS, PHP / MySQL, Umbraco, Wordpress and many more.  Great for testing and learning.
See: http://azure.microsoft.com/en-us/pricing/details/websites/

Corona SDK is now FREE

The Corona SDK is a 2D development platform with built-in physics, for building apps and games. It has over 1000 API libraries where most of the complicated programming has been done for you. If you are looking to get into games development, this is a good place to start. It used to cost $588 a year for the Pro version, but is now FREE. There are still small business and enterprise versions which are chargeable. Supports iOS,  Android, Kindle & Windows Phone 8, see: http://coronalabs.com/