We have created a few custom software to
work with the Hardware Security
Management from AEP Networks and
others.  We know the PKCS#11 interface.  
Most fortune 500 and Government
agencies are using this Keyper Enterprise
HSM for many digital signature security
and encryptions projects.
Crypto Manager V.3.5
copyright(C) 2006, 2007, 2008 Security Solutions Systems
Hardware Security Module (HSM)
Please NOTE:  
This Software is subjected to US export laws.