REBOL mode for Emacs
   Correct indentation and styling for REBOL coding in Emacs
   http://www.rebol.com/tools/rebol.el

STEEL
   An Integrated development environment for REBOL.
   http://www.rebol.it/steel/

VIM Syntax Files
   Syntax highlighting in the VIM editor for REBOL source.
   http://www.eandem.co.uk/mrw/vim/syntax/

reboLDAP
   A project intended to develop REBOL tools for the Lightweight Directory Access Protocol.
   http://vvn.net/reboldap/