OSS/J, now part of the TM Forum Interface Program, provides free of charge everything you will need to build your own OSS/J compliant products from the ground up or enable existing products to support OSS/J-based connectivity.

OSS/J APIs 
OSS/J APIs are developed under the Java Community Process and follow the TM Forum's eTOM map.
 
OSS/J Roadmap 
Describes at a glance the full scope of the OSS/J current work and future directions.
 
OSS/J Developer Guidelines 
Background information necessary for the development of OSS/J-compliant applications.
 
OSS/J Procurement Guidelines 
OSS/J Procurement Guidelines are designed to help telecommunication industry professionals measure the alignment of any product offering with OSS/J guidelines, standards, and position.