http://www.pdfforge.org/

One of the few programs I use that's not portable just because it's so awesome. Although it's likely not possible to make a portable print-to-PDF solution, there are several parts of this program that probably could be made portable. One part of the program PDF Architect was asked by someone on their forums if it could be made portable:
http://forums.pdfforge.org/discussion/c ... mment_9531

Here's hoping they follow through with that.

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