It is not based on ACS but on templating engine only. We preserved all GNU license notice in the source code, it is just that internal project is not completed and it is not ready to be released yet, we are all busy developing internal things we do not have resources for open source project support. I hope it will change very soon.
Also, as soon as we do not distribute it to anyone and use only internally we do not have to open source it.
Some parts like IMAP module for aolserver and SNMP modules are released as open source project and available to everyone. This is just demo how they can be used.
