The [IDE%|%integrated development environment%|%] for the [KDE] desktop.

   * Understands tcl/tk code syntax highlighting.
   * Source code folding.
   * External tools to invoke tclsh on the current file.
   * Can search [unix] [man] pages for highlighted words in editor (nice)
   * ActiveState [Windows] [Microsoft .chm Help Format%|%CHM] documentation can be included. (nicer)

Setting up the mime type for [tclsh]
   * Settings -> Configure Editor -> Filetypes -> New
   ** Name: Tcl
   ** Section: Scripts
   ** Mime types: Click the wand to open the dialog
   *** Locate text/x-tcl, check the checkbox and press "Edit" button
   *** Add "tclsh" to the Application Preference Order by pressing the "Add" button and type "tclsh" in the entry
   * Press the Configure dialog "OK" button
Now you can run a script by right-click on the respective tab and select Open With -> tclsh and the contents of the document will be sent off to tclsh. If you want to use wish, then add a "package require Tk" to the top of the file.

Probably other features that are to be discovered.