active directory equivalent for unix

At the moment we are integrating LDAP in our environment.
Compared to Windows this process is much complicated and time consuming.
With Windows you had Active Directory and if you create a new server, you just add it to the domain and your finished.
Yes, I know Unix is not Windows.
Are there any (commercial) solutions to ease the administration of ldap ?

LDAP is just a database, so you can manipulate it as such with the ldap-jdbc bridge and SQuirreL or other JDBC tools like xigole jisql command line SQL:
OpenLDAP, JDBC-LDAP Bridge Driver
SQuirreL SQL Client Home Page
http://www.xigole.com/software/jisql.jsp