Qiqqa
Qiqqa is a free, award-winning research management system. If you're serious about getting the most from your PDFs, Qiqqa is for you. Superb reference and document management. Import PDFs into separate...
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Book and Document Reader with PDF and DjVu support for comfortable reading. If you are looking for a good PDF reader, stop here, you have found it. It does what you expect it to do. You can easily lay...
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