Much information about different tclkits is found there: https://wiki.tcl-lang.org/page/Tclkit

What does my tclkit contain?

% info tclversion
8.5
% packages
invalid command name "packages"
% package names
rechan zlib tcl::tommath vfslib vfs::mk4 mk4vfs vfs Mk4tcl Tcl
%
# Not all packages are shown at first!  Only after trying to require an unknown package, 
# the package list is filled.
%
%  catch {package require thereisnosuchpackage}
1
% package names
Thread http tcl::tommath rechan opt tcltest mk4vfs vfs::zip vfslib msgcat 
registry zlib starkit Ttrace Tcl Itcl dde platform Mk4tcl vfs vfs::mk4