Free Text Editors

The following works with SciTE version 1.66 (but probably applies to other versions too).

By default REBOL support is not activated, so to enable that (for example on linux, similar on windows):

Edit /usr/share/scite/SciTEGlobal.properties file ( MenuBar Options > Open Global options File)
Search for the line "#import rebol.properties" and remove "#".
Save changes (SciTE must be launched from a root terminal.)
Edit /usr/src/rebol.properties file.
Go to the last line of this file and set the proper path to your preferred rebol VM version in the
command.go.($file.patterns.rebol)=....
Save the rebol.properties file
( this file can be located from Menubar Options>Edit properties>open rebol.properties).

Once you make all those changes you are able to see rebol color syntax for your beloved rebol scripts.

The scripts are launched into the rebol VM hitting F5 key in SciTE.

You will notice that the color syntax is very more advanced than the Crimson Editor one.

And you have the ability to hide the functions/objects inside code to make easier to read the script code.

Thanks to Shadwolf for the SciTE information above (which I cleaned/rearranged a bit)