The ManEdit UNIX Manual Page Editor is an editor specifically tailored
for UNIX manual pages. It has a preview viewer, uses the manual page XML
format for easy editing, and comes with a tutorial and reference guide.
It uses the GTK+ widget set and features syntax highlighting, a complete
drag and drop system for easy viewing and editing, a crash recovery
system, and sample manual page templates.

WWW: http://freecode.com/projects/manedit