This is Kwiki::Footnote module.

INSTALLATION

Kwiki::Footnote installation is straightforward. If your CPAN shell
is set up, you should just be able to do:

    % perl -MCPAN -e 'install Kwiki::Footnote'

Download it, unpack it, ehtn build it as per the usual:

    % perl Makefile.PL
    % make && make test

Then install it:

    % make install

Tatsuhiko Miyagawa <miyagawa@bulknews.net>