Under what license(s) are Tcl and such accessories as Tk, Expect, tcllib, ... available? Is it possible/practical/easy/... to use Tcl in commercial products? Is the Tcl license compatible with GPL?
The answers are ... [very liberal, and so forth]
The license for the standard Tcl distribution is http://tcl.activestate.com/software/tcltk/license_terms.html [purlize this?]. http://purl.org/tcl/home/software/tcltk/license_terms.html
[lots more details]