Apache::Backhand ties mod_perl together with mod_backhand, in two major ways. First, the Apache::Backhand module itself provides access to the global and shared state information provided by mod_backhand (most notably server stats). Second, the byPerl C function (which is not part of the Apache::Backhand module but is distributed with it) allows you to write candidacy functions in Perl.

Available from CPAN. See the module manpage for more information.