Provides extra language support needed to build large Tcl/Tk applications by introducing the notion of objects, which act as building blocks for an application.

An object-oriented mega-widget set which extends Tcl/Tk and is based on [incr Tcl] and [incr Tk].

A loadable shared library widget implemented in C that interprets HTML.

Document describing the changes to Tcl that enable it to be used in conjunction with POSIX Threads (pthreads). A download for Linux is available.

An extension provides access to MySQL database servers using simple Tcl commands.

A Tcl Interface to MATLAB and Mathematica.

Add-on to the Tk toolkit, adding new widgets, geometry managers, and miscellaneous commands.

Enhances Tk by adding support for the following image formats: BMP, XBM, XPM, GIF, PNG, JPEG, TIFF and postscript.

wxWindows extension for TCL.

A collection of utility modules for Tcl. These modules provide a wide variety of functionality, from implementations of standard data structures to implementations of common networking protocols. [Open source, BSD License]