"Markdown is a text-to-HTML conversion tool for web writers. Markdown allows you to write using an easy-to-read, easy-to-write plain text format, then convert it to structurally valid XHTML (or HTML)."
"Create drawings and diagrams with the Open-jACOB Draw2D Javascript library. The User interface allows interactive drawing by using your standard browser. No additional software; no third party plug ins. Just run it and use it."
"TiddlyWiki is written in HTML, CSS and JavaScript to run on any modern browser without needing any ServerSide logic. It allows anyone to create personal SelfContained hypertext documents..."
Dojo lets you prototype interactive widgets quickly, animate transitions, and build Ajax requests with the most powerful and easiest to use abstractions available.
"Among the more experimental features is support for Audio in HTML5. Combined with the canvas element, developers can create Flash-like content without resorting to a proprietary format."
"Using simple and semantic HTML, this method uses comprehensive CSS to create visually pleasing and extremely accessible web page forms for all purposes."