[hmstx]

QeRadiant was id's original public release derived from their internal QuakeEd. Q3's version of that became the open-source GtkRadiant (so there was a gui framework in the name somewhere at some point ; ), maintained by former id *nix build saviour TTimo (now contracting with Valve). A number of community forks have come out of GtkRadiant.

[masfoobar]

Yes -- GtkRadiant is what I was thinking of.

I was likely reading about TrenchBroom and, being Qt, made the confusion.

Thanks for the explanation and history.

[hmstx]

Fun fact - I just found out Netradiant Custom, a fork of a fork of GtkRadiant, moved from GTK to Qt. So, all in all... :)