Here is an article about difficulties in cross-platform GUI
development (nothing new, really).
http://www.informit.com/articles/article.aspx?p=787261
QtD doesn't need GCD anymore, apparently. I remember there were
several fussy requirements for QtD a year or so ago that were
rather off-putting.
http://www.dsource.org/projects/qtd
Another GUI toolkit I have come across is this one:
http://www.tecgraf.puc-rio.br/iup/
It sounds very interesting and is based on ANSI C and / or Lua.
If D bindings aren't too hard to implement it might be of
interest to the D community.
It runs on OS X too using X11, but maybe the GTKD add on for Mac
has solved this issue already:
http://www.tecgraf.puc-rio.br/iup/en/toolkits.html
