Visual Tcl
About
Visual Tcl is a freely-available, high-quality application development environment for UNIX, Windows, Macintosh and AS400 platforms. Visual Tcl is written entirely in Tcl/Tk and generates pure Tcl/Tk code. This makes porting your Visual Tcl applications either unnecessary or trivial. Visual Tcl is covered by the GNU General Public License.
Features
Extensible widget and geometry manager support.
Create compound widgets and widget libraries.
GUI interface for most aspects of Tcl/Tk development.
Support for user images and fonts in your project.
Imports pre-existing Tcl/Tk code.
Built-in support for widget toolkits including: [incr Widgets], BLT, TkTable