I can't comment on Tkx as I never used it, but I must say to advise avoiding Tk just because it is older is wrong. I prefer the
Stability of it. :-) It's nice not having your API change every 2 years as someone tries to add some whizbang features!! For many simple tasks, Tk is the way to go for it's ease of use and good documentation.... just like Perl5 itself.