lightweight PDF viewer

 MuPDF is a lightweight PDF viewer and toolkit written in portable C.
 It also reads XPS, OpenXPS and ePub documents.
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 The renderer in MuPDF is tailored for high quality anti-aliased graphics.
 It renders text with metrics and spacing accurate to within fractions of a
 pixel for the highest fidelity in reproducing the look of a printed page
 on screen.