Below list contains some companies products who are selling document DRM solution (used for creating protected copyrighted documents), while DRM scope is in varied media formats like documents, video, audio or flash but this article is discussing only DDRM.

From research I found that in DDRM (document digital right management) big chunk of customers come from manufacturing or core engineering group, this sounds little awkward though, otherwise as expected educational institution, training provider, multimedia publishers, research journals are the clients

This generation of DRM protection systems are much more strong but no system is 100% full proof specially if cracker is determined to break into a file nobody can stop him, in this situations whether to use DRM or not is a question, of-course normal peoples cannot crack something unless cracker has released automated version of him crack algorithms.

In most cases DRM implementations relies on Server and client side of application to create and allow consumption of the content, this makes it non-appealing to readers, now because adobe has its popular Adobe PDF reader readers should be comfortable downloading their Digital edition reader. Most solutions are supporting PDF formats as enterprise data are mostly crafted in PDF format.

Some of these companies have created free plugins for popular CMS like Joomla and wordpress and many aspire to create one, this should make their platform popular and could also generate new stream of business.

Adobe CS

Cost : approx 5000$ directly bought from adobe.

Formats : PDF, Epub

Developed in : Java

LockLizard

http://www.locklizard.com/purchase_digital_rights_management.htm

Cost : approx 6500$ for permanent license

Formats : PDF

DRM-X

http://www.drm-x.com/

Formats : Epub, PDF

Development : Works in Web services mode with PHP