Xpdf is an open source viewer for Portable Document Format (PDF)
files.ย� (These are also sometimes also called 'Acrobat' files, from
the name of Adobe's PDF software.)ย� The Xpdf project also includes a
PDF text extractor, PDF-to-PostScript converter, and various other
utilities.

Xpdf runs under the X Window System on UNIX, VMS, and OS/2.ย� The non-X
components (pdftops, pdftotext, etc.) also run on Win32 systems and
should run on pretty much any system with a decent C++ compiler.

Xpdf is designed to be small and efficient.ย� It can use Type 1 or
TrueType fonts.

Xpdf is licensed under the GNU General Public License (GPL)