SANE: http://www.mostang.com/sane/
Python API: http://starship.skyport.net/crew/amk/projects/
GIMP: http://www.gimp.org/
GTK: ftp://ftp.gimp.org/pub/gtk/
PINT: http://www.nicom.com/~dadbear/pint/
TWAIN: http://www.twain.org/
To find out more about SANE, there is an active mailing list that discusses issues revolving around the SANE API and the SANE distribution. The mailing list can be joined by sending a mail containing “subscribe sane-devel” to majordomo@mostang.com.