RText is a customizable programmer's text editor written in Java. Some of its features include: syntax highlighting, editing multiple documents at once, printing and printpreview, find/replace/find in files dialogs, undo/redo, and online help.
A stand-alone editor using Mediawiki markup language to generate HTML code. You can create and preview pages written using Mediawiki markup (i.e. Wikipedia pages) while off-line.