Few useful links for pdf generation in rails

http://www.accesspdf.com/pdftk/#packages

http://wiki.github.com/sandal/prawn/using-prawn-in-rails
http://railscasts.com/episodes/153-pdfs-with-prawn
http://wilsoncolab.com/blog/bryan/2008/11/30/writing-pdfs-with-ruby-on-rails-using-prawn-and-prawnto/
http://prawn.majesticseacreature.com/
http://www.cracklabs.com/prawnto/use

http://rdoc.info/rdoc/sandal/prawn-layout/blob/bcfac3efffb68a0b3c9f1007c1c1193443470afc/Prawn/Document