Tcl/Tk: The 35-Year-Old Toolkit That Still Builds Cross-Platform GUI Apps

Develop Cross-Platform CLI and GUI Tools with Tcl/Tk

Tcl/Tk, created by John Ousterhout in 1990, remains a powerful, open-source toolkit for building cross-platform CLI and GUI tools. This guide covers its event-driven architecture, native-looking GUIs, and compact single-file apps, while addressing common misconceptions and limitations. It also explores practical use cases, from Decent Espresso to Android via Androwish, and highlights Tcl 9.0's modern features.