iSafePDF - iSafePDF is a free open source PDF protection software.
MerlinOne - MerlinOne offers digital asset management software solutions news to media, non-profits, universities, government and corporations.
PDF Unshare - pdf unshare, pdf protection, protect, share, updf, prevent, Lock PDF, Encrypt PDF, PDF Access, Lock, PDF, Encrypt, Access
Brandfolder - One link to all your marketing assets. Brandfolder is your convenient source to visually organize, quickly find and easily share all your final brand assets.
PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
FileOpen RightsManager - Encrypt documents and set policies locally while managing permissions and authentication in the cloud. Advanced rights management tools for smart publishers.