Jacob Kaplan-Moss

Earth Class Mail

Basically an online P.O. box; they'll scan & shred mail sent to a snail mail address. Kinda expensive, but sounds awesome.

(lifehacks, mail, office, paperless, pdf, postal, productivity, scanning, services, tools)

Yep

The PDF organization software I'm using with my ScanSnap. Only about 10% of the features of DEVONThink, but the 10% I use. Very well done, and purty to boot.

(organization, pdf, scansnap, software)

macosxhints.com - 10.4: Combine PDFs without using Automator

Man, OSX ships with all sorts of gems.

(osx, pdf, python)

pdftk - the pdf toolkit

(pdf, software)

Handbook of Applied Cryptography

Recommended by Bruce Schneir and available online for free.

(book, cryptography, encryption, pdf, pmscs, reference, security)

Free Quicksilver user guide ebook - Lifehacker

(mac, osx, pdf, quicksilver, reference)