Codemirror

Codemirror is a great JavaScript based editor and it supports a wide variety of languages (HTML, CSS, PHP etc.)

This plugin for Joomla! brings it to your site as an editor.

Download Codemirror 1.0.0
Compatible with Joomla 1.5

Instructions

Go to Global Configuration (or User Manager) and set Editor - CodeMirror as default editor

Codemirror