9
Started putting QR codes on my projects to link to source code, document wiring, etc
(discuss.tchncs.de)
also try thunar, it does this and when you start typing it does not start a search (which would freeze the entire app for me) but jumps to the first file with that starting letter. Nautilus is just ... special.
I use noteqr.de. Those are pre-printed qr codes, you just scan them and add content afterwards.