Pocket Scanner - Pocket Scanner is the best app for quickly scanning documents to JPEGs or multi-page PDFs.
PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
PaperSave - PaperSave is a complete document management, electronic workflow and transaction (invoice and gift) automation solution, for Microsoft Dynamics and Blackbaud.
ScanTailor - Scan Tailor is an interactive post-processing tool for scanned pages.
ccScan - ccScan provides solutions to scan or import documents directly to the cloud storage providers.
Briss - Cross-platform application for cropping PDF files in a simple and fast way via a GUI.