* http://hacks.oreilly.com/pub/h/2429 # PDF::API2 example
* http://search.cpan.org/dist/PDF-API2/
* http://www.printaform.com.au/clients/pdfapi2/ # tutorial
* http://www.template-toolkit.org/docs/plain/Manual/Filters.html#latex_outputType_ # in TT
* http://search.cpan.org/user/rkinyon/PDF-Template-0.22/lib/PDF/Template.pm
* http://search.cpan.org/user/ftassin/PDF-Create-0.01/
Don't forget PDF::Reuse. It can be used both for adding to an existing PDF and building a new one from scratch. We use it for some pretty big jobs and it's fast and reliable.