I've created a new project: Guitor, a GUI creaTOR module written in winxed using Xlib via NCI.
It's not much feature complete yet, but has enough funcionality to provide some nice examples, including a viewer for R->R functions and a drawing board.
I've tested only in linux amd64 and i386, so the StructView used may be not appropiate in some platforms, feedback will be appreciated.
Install: winxed setup.winxed install
Run an example: winxed examples/pizarra.winxed