The following are available:

iSHARE:

• IAA Framework
• Certified roles
• Data licenses

Poort 8:

• Commercially available Authorization Register as a service
• Representation Register
• Association Register as a Service
• Consultancy implementation 

KPN: 

• Enterprise grade services infrastructure for data spaces (DSH) 
• Association Register as a Service 

CGI: 

• Consultancy and software development BDI 

Computest: 

• Pentesting BDI infrastructure