OTcl is MIT Object Tcl (see MIT otcl) [L1 ] [L2 ].

Other references.

 What: Gn
 Where: ftp://cgl.uwaterloo.ca/pub/software/meta/ 
 Description: Gn is an interactive 3D graphics OO toolkit built on top of OTcl.
        It supports 30 classes representing materials, shapes, lights, cameras,
        and other 3D paraphenalia.  Has been used on Alphas, SGIs and
        tested under Linux and Solaris with Mesa.
 Updated: 01/1997
 Contact: mailto:[email protected]  (Michael McCool)
 What: MASH
 Where: http://www-mash.cs.berkeley.edu/mash/ 
 Description: A multimedia networking toolkit employs a "split programming
        model," where complex multimedia programming tasks are decomposed into
        an arrangement of simple objects that are linked together and configured
        by a scripting language like Tcl.
        Includes a variety of stand alone commands such as MediaBoard, vic,
        vat, mb, collaborator, mui, nsdr, recorder, player, rover, PAthfinder,
        MPlug, MediaPad, a variety of services, libsrm (a multicast toolkit),
        SCUBA (real time multimedia bandwidth sharing), MBONE collaboration,
        coordination tools, the MeGa agent architecture, and a OTcl/C++
        framework called TclCl.  Many of the URLs on this web site are
        no longer valid - it doesn't appear much if anything has been
        updated since 1999.
 Updated: 09/1998
 Contact: mailto:[email protected] 
 What: MIT otcl extensions and patches
 Where: From the contact
 Description: Contact has posted a couple of patches, including one that
        gives "gensym" support - by specifying gensym as the name
        of the object, a unique object name is returned.
 Contact: mailto:[email protected]  (Joe Hildebrand) (???)
 What: MIT otcl megawidget system
 Where: From the contact
 Description: A simple otcl megawidget system.  Unsupported.
 Contact: mailto:[email protected]  (Martin Andrews)
 What: Win32 Tcl and Tk patches (jessikat)
 Where: http://www.jessikat.demon.co.uk/ 
 Description: A variety of patches to Tcl and Tk for Win32s.
        There are patches for wm activate bug, memory debug support,
        listbox justify, cursor, panics, and tkCanvWind.  Also on this
        page are patches and ports of a variety of extensions and
        applications such as DDE, tclStruct, BLT, otcl and a clock
        application.  Tiled widgets problematic, bgexec/busy not
        working, drag&drop ok with dde.  Also a small balloonHelp (blnhlp)
        package is available here as well.  Rotating text didn't make
        it, nor did drag and drop.  Also find a general dll
        caller for the Intel win32 platform which creates a namespace
        called dll containing the dll routines that can be called.
        Contact tested with VC++ 6.0 and Tcl 8.0.4.  It relies on the
        way MSC 4.0.  Site also has a crypt dll.
 Updated: 04/1998
 Contact: mailto:[email protected]