Pastebin++ for web technologies: paste javascript, css and html and get a rendering of them all at once. Create packages and version them, publish to your blog, etc. MooTools, jQuery, Prototype, YUI, Glow and Dojo all supported.
It wasn't that long ago when I was searching for a couple of good code-snippet applications to store bits of source code. Well, I found a couple and published 2 Really Useful Code Snippet Applications. Now, I've found a few more worth noting, each with their own strengths and weaknesses, but they all serve their purpose nicely.
Snippets is a public source code repository. Easily build up your personal collection of code snippets, categorize them with tags / keywords, and share them with the world