ASED Tcl/Tk Ide
   Editor written in pure Tcl/Tk. Tcl specific features are: test mode to run code with different wishs, sourcecode navigation through Code Tree Browser, support of namespaces as well as itcl and some code templates.
   http://www.mms-forum.de/ased/asedmain.htm

GIPSY
   A powerful dynamic graphics tool for real-time data display. Includes VisualGIPSY, a GUI Builder for Tcl/Tk applications written in Tcl/Tk.
   http://www.prs.de/prs/products/gipsy/

MyrmecoX
   A suite for Tcl development including an IDE (tcl/tk 8.3, editor, debugger, keyword, wrapper) and Tcl extensions.
   http://www.neatware.com/myrmecox/

SpecTcl
   A free WYSIWYG GUI-builder - convenient for making widget layout or constructing menus.
   http://spectcl.sourceforge.net/

TCL Developer Studio
   A project to create a framework for working with Tcl projects.
   http://kakunin.chat.ru/tcldev/

TclPro
   Tcl tool set including graphical debugger, static code checker, wrapper to generate stand-alone executables, compiler to write Tcl byte-codes, loader to read byte-codes.
   http://www.tcl.tk/software/tclpro/

The Visual Tcl Project
   Freely available application development environment for any platform Tcl/TK runs on. It is written entirely in Tcl/Tk and generates pure Tcl/Tk code.
   http://vtcl.sourceforge.net/

tkBuilder
   Tool designed to facilitate the construction and testing of interfaces using Tcl/Tk.
   http://sawpit.iwarp.com/