libpdf is an LGPL licensed plain C pdf reading library. It is currently available for download via anonymous CVS. You can browse the CVS repository by clicking here. To check the whole thing out:
set CVSROOT=:pserver:anonymous@blushingpenguin.com:/usr/local/cvsroot
cvs login
(Logging in to anonymous@blushingpenguin.com)
CVS password:<ENTER>
cvs co libpdf
Coming soon - single file downloadables, documentation and binaries. If you have a need for this in the meantime, then email me.