Used Tcl/Tk for several years, mostly to help me do my job, and for fun. I am an engineer by training, but "I'm not a coder, but I play one on TV".
I have helped out with Iwidgets, Itcl, libpgtcl, and PGAccess (GUI frontend to PostgreSQL). I also have some personal projects that I still need to finish.
I live near Seattle, WA USA