There's xpdf which includes the
Pdftotext converts Portable Document Format (PDF) files to plain text.
On Linux there's a installer available. It seems that it also comes in the
poppler-utils package. On OS X you could install it using Homebrew (install that first) and then use
brew install homebrew/x11/xpdf
which will download the source files and compile it for OS X. After that, just use it like:
which will generate a plain text file. There are a couple of options as well, check out
man pdftotext for more details.
An alternative is poppler, in OSX:
brew install poppler
in Debian and friends
apt-get install poppler-utils