Logos of the Technische Universität München in hand-written PostScript. Why? Because I can!
You'll want to use GhostScript since GS supports more PostScript features and renders better than other libraries like poppler. GS is bundled with just about every desktop Linux distribution and can be installed from the repositories in ever other.
You can also instruct GhostScript to convert the PostScript sources to PDF files which can be displayed by just about every PDF viewer and program that handles PDF:
gs -sDEVICE=pdfwrite -sOutputFile=output.tum.pdf -dBATCH -dNOPAUSE input.tum.ps
The files are CC0 licensed, so they are as free as possible from my side.