Now here’s a free web service I find extremely useful.
We get dozens of PDF documents from the university, but some of them (annoyingly enough) are locked for printing. Printing long articles is essential, at least until we have e-book readers that are good enough at displaying scanned PDF files.
Using this free, online unlock service for PDF files, you can now print locked PDF files or copy parts of them into other documents. You simply upload the file you want to unlock, agree to the don’t-blame-us-we’ll-blame-you Terms of Service, and this service does the rest for you.