Some of the ones listed here, notably TclX, are among the first and most widely used extensions. 40 groups to customize your need. Works with 8.0.x and 8.3.1. It can support virtually any type of system for backup, and since it is a Tcl extension, you can create as elaborate or simple an interface as you desire. Naos can be displayed using standard Tk and we have added BLT to better support image display and graph plotting.
Documentation is available online.
I am currently working on a MICO module for Tcl. HelpSystem.rar Help browser for your Tk programms. Source of help files is based on HTML language. Can be used as stand-alone or embedded in your programm. It generates wrapper code that is linked with your library in order make a DLL compatible with tcl load command.