I’m quite impressed with the native theming changes that were made in Tcl/Tk 8.5. Compare the Syscomp Design Oscilloscope under Tk 8.4 with ActiveTcl 8.5:
Nice fonts, nice widgets, better packing, and much closer to the desktop theme.
I’ve used Python’s Tk interface before for small, quick applications but have always been put off by how it looks. Definitely time to give it another go!