prodatum is an EMU Proteus 2000 patch editor for Linux/Mac/Windows.
v2 no longer depends on a patched Fl_File_Chooser and links fine with
existing FLTK 1.1 or 1.3 installations (for the looks I recommend
linking statically with a scheme-patched FLTk version though, patch is
in the source tree). If you own one of those old E-Mu synths, give it a
try. I'm sure you'll like it.