My favourite thing about Tcl is (was? This was 25 years ago) that adding commands just requires a couple of Tcl things, then an argc/argv, so it was relatively

My favourite thing about Tcl is (was? This was 25 years ago) that adding commands just requires a couple of Tcl things, then an argc/argv, so it was relatively simple to turn an existing C program into a Tcl command: int my_command (ClientData clientData, Tcl_Interp *interp, int argc, const char *argv[]) { ... } However, that might have been the only thing I liked about Tcl. For some binary data import tasks I ended up writing a Perl program that translated it into Tcl.