411 REFERENCE · Wikibooks
GtkRadiant/installation
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Source code
https://github.com/TTimo/GtkRadiant
NetRadiant - a GtkRadiant 1.5 fork
Tutorials
Debian Linux + GtkRadiant + Urban Terror HOW-TO
Configure GTK Radiant under Linux