CodePress is web-based source code editor with syntax highlighting written in JavaScript that colors text in real time while it's being typed in the browser.
The above block of code demonstrates an in-browser, syntax-highlighting, auto-indenting JavaScript editor. Use ctrl-i or ctrl-space (depending on which one your browser interferes with) to re-indent the current line. Known issues are...
syntax highlighting of code snippets in a web page A Javascript module and CSS file that allows syntax highlighting of source code snippets in an html page.