KryptoKoder develops applications and scripting language modules for digital signatures of PDF and DWFx documents.
MyPDFSigner is a desktop application and a set of language (PHP, Ruby and Python) modules to digitally sign PDF documents using tokens stored in a PKCS#11 security device (a smart card, like a citizen card issued by many governments in Europe, or a USB token), a PKCS#12 file (a *.pfx or *.p12 file), the Windows Certificate Store, and the Apple Keychain Store.
The desktop application is available for Windows, Mac OS X and Linux, while the scripting language modules are currently only available for Linux (the exception is the Python module which is also available for Windows). A command line interface is also available in all platforms. MyPDFSigner supports Time Stamping (RFC 3161), PAdES LTV, Encryption and Batch Signatures.
PDF documents signed by MyPDFSigner are correctly displayed by Adobe Reader.
MyDWFSigner is a desktop application to digitally sign DWF (Design Web Format) documents on a Mac OS X system. MyDWFSigner supports the PKCS#11, PKCS#12 and Apple Keychain Key Stores.
Like Autodesk's Design Review, digital signatures of DWF documents are only possible after the files are converted to DWFx. At the moment MyDWFSigner does not yet convert DWF to DWFx, so to be able to sign a DWF document the same needs to be saved as DWFx.
DWFx documents signed by MyDWFSigner are correctly displayed by Autodesk's Design Review.