XOTcl ver. 1.5.4 is now available in:

a) FreeBSD ports tree (packages will be built in the next days) http://www.freebsd.org/cgi/cvsweb.cgi/ports/lang/xotcl/

b) WinTclTk distribution for Microsoft Windows, version 0.5.2 http://wintcltk.sourceforge.net

A single-file wrapped tkcon.exe that includes XOTcl 1.5.4 can be downloaded from: http://wintcltk.sourceforge.net/tkwrap.html