Ghostscript is an interpreter for the PostScript page description language used by laser printers. An interpreter for the PostScript (TM) language and the Adobe Portable Document Format (PDF -- sometimes confused with Acrobat, Adobe's PDF browser/editor product)
Features:
An interpreter for the PostScript (TM) language, with the capability to convert PostScript language files to many raster formats, view them on displays, and print them on printers that don t have PostScript language ability built in;
An interpreter for Portable Document Format (PDF) files, with the same capabilities;
The capability to convert PostScript language files to PDF (with some limitations) and vice versa; and
A set of C procedures (the Ghostscript library) that implement the graphics abilities that appear as primitive operations in the PostScript language.

The license of this software is Freeware, you can free download and free use this printer software.