Buenas noches,
en el grupo sobre Harbour en Facebook he encontrado este editor:
http://www.uvviewsoft.com/synwrite/
Y uno de los componentes del grupo (Vlad Ermakoff) comenta lo siguiente:
Good source code editor SynWrite which supports Harbour syntax highlighting and integrates with compiler.
http://www.uvviewsoft.com/synwrite/
It's not an advertising because Synwrite is free and open source.
Some tips for configuration for Harbour.
First, in menu "Options"->"Customize lexer library" - uncheck "Foxpro" item.
How to configurate compiler calling is described in Help, topic "External tools", here are just some hints. In my projects I use hbmk2 and .hbm file with the same name as the main file of a project, so in the field "File name" put hbmk2.exe and in the field "Parameters" just put "{FileName}".
Or you can put there a name of a batch file that you use for build your projects.
For "capture output" you'll need a regular expression for output pattern, so here it is:
(\w+\.prg)\((\d+)\) .*
Saludos