Windows Scan - Scan (and save) documents and pictures
NAPS2 - NAPS2 is a document scanning application with a focus on simplicity and ease of use.
CloudScan - CloudScan. Free Scanning Software. (Scan to PDF and TIFF Everywhere Easily)
Simple Scan - Project information. Part of: The Gnome Project. Maintainer: Simple Scan Development Team. Driver: Simple Scan Development Team. Licence: GNU GPL v3.
MetaDMS Scan Software - MetaDMS Scan Software is a free to use program for the Windows operating systems for scanning paper documents within few clicks.
VueScan - Third-party software for film scanners and flatbed scanners.