The Perl Tk GUI is very easy to use, if you do some basic homework. The main thing is to understand how "frames" and geometry management works. Most beginners don't use enough frame objects and things wind up in weird places. I don't know of a "GUI builder drag-n-drop" for Perl Tk. One of my GUI I/F's runs like a rocket and is just a few pages of Perl code. This thing has up to and beyond 80,000 objects and works great (<50ms display time).