qeradiant

qeradiant is a Quake 3 level editor. There are two versions. The Gtk version is (you guessed it) build on top of Gtk and the MFC version is build on top of the Microsoft Foundation Classes GUI framework.

If you are interested, the Gtk and MFC versions are available on the intranet here.

features

MFC version:

• Platform dependent widgets
• No themes
• OpenGL integration

Gtk version:

• Platform independent widgets
• No themes
• OpenGL integration

platforms

MFC version:

• Windows only

Gtk version:

• Windows
• Linux

pricing

I could only find this message from the web site:

QERadiant is FREE. It is based on the source code released by id software for QE4 (the editor they used to make Quake2). Do NOT send me or ask to send me money or compensation of any kind. If you have extra money laying around, give it to a good abused children's charity.