The newer versions of Tcl have OOP. Even the older ones support it through addons like itcl [incr Tcl].

I quite like Tcl. Many of the 3D graphics packages have a Tcl console (at least the older ones do) and the OBJ file format is basically a Tcl file.

Tcl/Tk was a fast and easy way to get a GUI up and running on Unix/Linux. Expect is still extremely useful at times.