Quake3World

Is there any alternative level editor for Q3? I really can't get used to the Radiant editors. Hammer, maybe?

Notepad++

Quake Army Knife

Notepad, that's the way Lunaran made the You'll Shoot Your Eye Out level... QuArK was too tricky for me, so I stayed at Radiant. Maybe it's forks, like NetRadiant or DarkRadiant, or old one Q3Radiant

lol no, Lunaran didn't use Notepad for that. At least, not in the way you probably mean.
He wrote Python scripts to generate the level's geometry.

How sweety is the generated map

3d studio max, maya, blender etc, most have converters that will output to a .map or a .ase.