PDFTK Builder is a free graphical interface to for PDFtk, making it much easier to use. It is a easy to use tool to collate (merge), split, encrypt, decrypt, stamp and rotate (only 90°, 180° or 270°) pdf documents.
It could have been called something like pdf-to-pdf. It also provides many useful capabilities to developers of PDF-producing software or for people who just want to look at the innards of a PDF file to learn more about how they work.
PDF Architect is a PDF Editor with free functions like rotate, delete and move pages and even more like editing text, PDF to Word, 256 Bit AES Encryption and more.
iSafePDF is a free open source PDF protection software.
It allows you to encrypt PDF document, sign them using a certificate and timestamp the signature.
All those features are PDF standards so your document will be readable/editable with all standard PDF programs.
PDFTools is a PDF management application. It can encrypt, decrypt, join, split, stamp, create and rearrange a PDF file.Discontinued
Last version, 1.3, was released on August 2007. It is still downloadable from the official website.
SharePDF is an easy to embed PDF reader that provides you with detailed reading analytics for PDF documents to help you optimize your documents, whitepapers, brochures, catalogues, e-books etc.This app doesn't have any features at the moment.
FileProtect provides a secure digital rights management (DRM) wrapper around all your sensitive files, including Adobe PDF and Microsoft Office (Word, Excel, Powerpoint). With FileProtect, there are no plugins to install or update — it all just works.
jPDFSecure is a Java PDF SDK that can digitally sign PDF documents and change security settings on PDF Documents. With jPDFSecure, your application or java applet can encrypt PDF documents, set permissions and passwords, and create and apply digital signatures.