http://bitgen.org/bitnote
Here are an examples of a generated paper wallets:
http://bitgen.org/bitnote/example_canton.pdf
http://bitgen.org/bitnote/example_rtuga.pdf
http://bitgen.org/bitnote/example_timbo.pdf
To generate a postscript file, use the bitnote command with the WIF as parameter, for example:
$ ./bitnote Kx1oiWaDdU5udEbAzQfEztwR2YzRedbwaN9H8GJqtGVKj5J6ReDD
A design can be specified as a second parameter, currently one of "canton", "mrno", "rtuga" and "timbo".
A bitcoin amount can be specifed as the third argument.
Example:
$ ./bitnote Kx1oiWaDdU5udEbAzQfEztwR2YzRedbwaN9H8GJqtGVKj5J6ReDD rtuga 1.3
The code is open source, and uses the same bitcoin library as bitgen:
http://bitgen.org/
The designs originate from this thread:
https://bitcointalksearch.org/topic/bounty-closed-open-source-cc-paper-wallet-kit-for-safe-offline-coin-storage-155847