This is the Perl distribution Text-Pipe. It provides a common text filter API.
Text-Pipe installation is straightforward. If your CPAN shell is set up, you should just be able to do
% cpan Text::Pipe
Download it, unpack it, then build it as per the usual:
% perl Makefile.PL % make && make test
Then install it:
% make install
Text-Pipe documentation is available as in POD. So you can do:
% perldoc Text::Pipe
to read the documentation online with your favorite pager.