Latest Release: Tcl/Tk 9.0.0 (Sep 26, 2024) Tcl/Tk 9.0 is the latest major release of both Tcl and Tk. It features many new capabilities, and presents some incompatibilities with Tcl/Tk 8. Download Tcl/Tk 9.0.0 Source Releases Highlights of Tcl 9.0 64-bit Capacity: Data values larger than 2Gb Unicode and Encodings: full codepoint range, added encodings, encoding profiles to govern I/O, and more. Z