Tcl/Tk 9.1 Released

Tcl/Tk 9.1.0 was released on September 29, 2026, as the current development version building on Tcl/Tk 9.0 with new features targeting stable releases. Key additions include new Unicode normalization commands, a monotonic timer with microsecond resolution, list filtering capabilities, accessibility screen reader support in Tk, bidirectional text support, and a new ttk::toggleswitch widget, along with various C API enhancements and performance improvements.