NAPS2 - NAPS2 is a document scanning application with a focus on simplicity and ease of use.
inSSIDer - inSSIDer Essential makes it easy to maintain small business WiFi.
Simple Scan - Project information. Part of: The Gnome Project. Maintainer: Simple Scan Development Team. Driver: Simple Scan Development Team. Licence: GNU GPL v3.
NetSpot - NetSpot is a free app for wireless site surveys, Wi-Fi analysis, and troubleshooting
XSane - A good proposal for SANE-2 has been written.
Homedale - With Homedale you can search for Wi-Fi / WLAN Access Points and monitor their signal strength.