Kerberos is an open source project of the Apache Software Foundation (certified LDAPv3-compatible by The Open Group in 2006) with its Apache Directory Server - an embeddable directory server entirely written in Java, as its flagship product.
Massachusetts Institute of Technology Apache Directory is an open source project of the Apache Software Foundation. Its flagship product, the Apache Directory Server, originally written by Alex Karasulu, is an embeddable directory server entirely written in Java. It was certified LDAPv3-compatible by The Open Group in 2006. Besides LDAP, the server supports other protocols as well, and a Kerberos server. 
