Programmer's File Editor, free(share?)ware for Windows - not exactly one of the Tcl editors, but good enough for RS at home:
http://www.lancs.ac.uk/people/cpaap/pfe/ : "Development and distribution of Programmer's File Editor has come to an end, and the PFE Web Site is now closed; regrettably time will not permit replying to PFE-related e-mail." That page gives some mirror links, however.