Briss - Cross-platform application for cropping PDF files in a simple and fast way via a GUI.
Tiny Scanner - Fast and easy to use mobile document scanner.
ScanKromsator - Scan Software with several advanced options
Docus - Docus is a simple yet powerful Document Scanner for Android that enables you to scan various types of documents with great ease.
PDF Scissors - Crop pdf. Drop margin, whitespace. Auto crop all pages. Easy feature to make nice cropped pdf for ebook readers such as Amazon Kindle, Sony, Cybook etc.
DocScan - DocScan is a PDF document scanner application for the iPhone smartphones that lets the users to scan their documents and get them in the PDF files.