jPDFViewer - Use jPDFViewer Java PDF SDK to integrate a PDF reader right into your Java application or website.
Planogy - A feedback platform for all the creative work
MuPDF - MuPDF is a lightweight PDF and XPS viewer.
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Altarsoft PDF Reader - Altarsoft PDF Reader is a simple to use PDF files management program that allows its users to view PDF files, encrypt the files and even annotate these files as well.
Usersnap - Visual Feedback - Usersnap helps your business with its versatile feedback platform to build better, more successful products and services with the help of user feedback. Collect feedback along your product development lifecycle. Try it for free.