These are some things I've hacked together over the years for using SANE.
License: GPLv2
scanpdf is a command line utility for scanning things and producing a PDF. It takes an irritatingly complex Rube Goldberg of tools in order to get the final PDF to have the right DPI.
A simple web interface that wraps scanpdf, so that people in my family who are allergic to the command prompt can scan too. Its not designed to be secure, and I don't bill myself as a very good web developer; please don't judge me by this too harshly.