Xpdf is an open source viewer for Portable Document Format (PDF) files. (These are also sometimes also called ´Acrobat´ files, from the name of Adobe´s PDF software.) 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. 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. It can use Type 1, TrueType, or standard X fonts.
Xpdf should work on pretty much any system which runs X11 and has Unix-like (POSIX) libraries. You´ll need ANSI C++ and C compilers to compile it. If you compile it for a system not listed on the xpdf web page, please let me know.