Xpdf is a suite of utilities for viewing, converting, and analyzing Portable Documant Format (PDF) files. These files are often called acrobat files after the name of another PDF application. Xpdf can convert PDF files to PostScript, text, and Image. It can analyze the fonts used in the document and also give you information about the document.

Similar applications: 
ePDFViewer, Adobe Acrobat, Adobe Reader