My own range of plugins designed for webd designers and developers. Currently there is a slide show and a dialog window generator. See the CF-JS home page.
An open-source email marketing service. Intall your own newsletter service.
A very easy to use HTML 5 game engine for 2D browser games. Impact JS features a browser-based level designer. A commercial license is available for $99.
Another excellent browser game engine. It provides an extensive library for making a variety of HTML 5 games. Standard version available fo free.
Takes care of a few of the most used CSS3 styles in old browsers. I use this one a lot.
A comprehensive list of polyfills for just about everything.
The definitive resource for all web development purposes.
A complete reference to everything web. Includes definitions, legacy support and examples.
More of a community than a learning tool, the forum based site provides answers for just about everything, supported by a highly active community.
All the web fonts you could need.
A good selection of free and not free fonts as well as a great tool for detecting the font-family from an image source.
Another great font resource with a number of free fonts.
My personal favourite drawing application. If you use pen tablets I highly recommend it, expensive however.
If you have a ton of extra cash these people make great things. For the price of top-of-the-range laptop you can get a pen tablet that would make any digital artist orgasm. If you are looking for a cheap alternative I suggest the Genius range.