Paperwork is a GUI to make papers easily searchable using OCR.
The basic idea behind Paperwork is "scan & forget" : You should be able to just scan a new document and forget about it until the day you need it again.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.