Latest Release: Tcl/Tk 8.5.19 (Feb 12, 2016) The 8.5 release was a long time in development, and brought about several good enhancements to Tcl/Tk. Download Tcl/Tk 8.5.19 Source Releases Download ActiveTcl 8.5.19 Binaries Highlights of Tcl 8.5 Features: 8.5 has over 90 TIPs included to provide a wide variety of new features.

8.5 has over 90 TIPs included to provide a wide variety of new features. Bignums: Tcl now supports arbitrary-precision integers, which improves math operations on large integers.

Tcl now supports arbitrary-precision integers, which improves math operations on large integers. Safer interps: Tcl's powerful safe interpreter mechanism now has improved control of time and command limits in slave interpreters.

Tcl's powerful safe interpreter mechanism now has improved control of time and command limits in slave interpreters. clock command: More robust implementation of command for specifying time, with significant l10n and i18n improvements.

More robust implementation of command for specifying time, with significant l10n and i18n improvements. dict command: New data structure that allows access to data by value rather than a variable name, which is substantially faster.

New data structure that allows access to data by value rather than a variable name, which is substantially faster. Additional improvements: Faster list search, new and improved mathematics procedures, anonymous procedures, new ways to package Tcl extensions, Tcl-level custom channel types, file and line location information for each command, and more. Highlights of Tk 8.5 New modern theming engine: New and complementary widgets that make use of platform-specific theming on Mac OS X and Windows to better fit in with those environments, and feature an improved look and feel under X11. (screenshots)

New and complementary widgets that make use of platform-specific theming on Mac OS X and Windows to better fit in with those environments, and feature an improved look and feel under X11. (screenshots) New widgets: Part of the themed widget set, Tk now has core notebook, combobox, treeview and progressbar widgets.

Part of the themed widget set, Tk now has core notebook, combobox, treeview and progressbar widgets. text widget: Smooth scrolling, widget peering, and improved procedures for counting and replacing text.

Smooth scrolling, widget peering, and improved procedures for counting and replacing text. Font rendering: Now uses anti-aliased text under X11, and a more modern text engine (ATSUI) on Mac OS X.

Now uses anti-aliased text under X11, and a more modern text engine (ATSUI) on Mac OS X. Additional improvements: Window transparency, new fullscreen option for windows, enhancements to specific widgets and window layout, and more. There is of course much, much more. See 8.5 Changes on the wiki for a complete list of new features.

