FIT [http://fit.c2.com] is a testing framework originally
created by [Ward Cunningham] "specifically applicable
to acceptance tests like those prescribed by 
[Extreme Programming]."  Its home site is a [Wiki] where
its ongoing development continues.

Dave Thomas re-did FIT for [Ruby] [http://fit.c2.com/wiki.cgi?RubyDownloads].  Lisa Crispin has promised
to test a [Tcl] version, if one of us will just make the time
to create it.