DocFly - The Best Online PDF Editor. Create, Edit & Convert up to 3 PDF Files a month for FREE with the best free pdf editor!
ScanTailor - Scan Tailor is an interactive post-processing tool for scanned pages.
PDF-XChange Editor - The smallest, fastest, most feature-rich PDF editor/viewer available
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Wondershare PDFelement - All-in-one PDF editor
ScanKromsator - Scan Software with several advanced options