Fltk [http://starbase.neosoft.com/~claird/comp.windows.misc/FLTK.html] binding

[Performance of networking applications]

http://pages.infinit.net/cclients/ - where a series of useful
Tcl related applications and extensions can be found, such as:

 What: Grab
 Description: General purpose window capture functionality for use with Tcl scripts under Windows, provided as a console command version.
       Currently at version 1.0.

 What: Image 
 Description: Stubs based Windows extension for Tcl 8.2.0 and later, providing a range of image processing functions useful for  manipulating images in color index format.
       Reads image data from BMP, GIF, JPEG, PNG, TIFF formats and supports a RAW file format.
       Does NOT use Tk and does no visualization.
       Currently at version 1.0. 

 What: Variety of Windows extensions (Findleton)
 Description: Currently available are extensions that support DDE (v 203),  Winhelp (2.0), printing (tkprint 1.1.5), frame animation, BMP creation, and an extension that does "everything" that DDEML does, including being able to write DDEML servers entirely in Tcl.

 What: Containers
 Description: Small Tcl extension that implements basic container objects, such  as bag, queue, tree, priority queue, random queue, struct, stack, hash, FIFO, LIFO, etc.  Code is in C++, using templates.
       Free for non-commercial use, written permission of author otherwise.
       Source available, as well as a binary distribution for Windows.
       Currently at version 1.1.