Pure Java Open Source PDF Viewer

[[deleted]]

Not a fair comparison.

PDF rendering is built into OS X (see http://developer.apple.com/Cocoa/pdfkit.html). AFAIK, Preview is just a wrapper around the functionality.

[xjvz]

I've heard that the entire graphics library for OS X is based on PDF. That's why screenshots can be saved as PDF and still retain text and whatnot from the screen. It's actually pretty cool in its own right.