FFS, I clicked around for a few minutes and not a single screenshot of what the GUI toolkit is capable of. Even the highlights’ “Themed, Truly Native User Interfaces” chapter and the freaking docs that describe the widgets do not show a single screenshot. I’m shaking my head in disbelief.
Wow, that sounds really traumatic :(
Try https://wiki.tcl-lang.org/page/Showcase .
Also https://cgicoffee.com/blog/2026/04/tcl-tk-develop-cross-plat... (takes a little time to load).