LDAPman Directory Server List
Product List - Directory
Servers
There are more LDAP servers out there than you'd
think. If I've left off your favorite LDAP server, please let
me know.
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OpenLDAP --
Are you a do-it-yourselfer? This one is free! Since it's source code,
you can compile this for most computer platforms
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Messaging Direct's M-Vault
LDAP server -- For Solaris, NT, IRIX, AIX, and
Linux
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iPlanet
/ Netscape Directory Server -- For Solaris, NT,
HP-UX, AIX, IRIX, and Linux
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Novell NDS eDirectory
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IBM Directory
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Microsoft
Active Directory -- Warning: Though Microsoft
touts Active Directory as an LDAP server, its LDAP support is not fully
debugged yet -- their ADSI interface is reportedly stable. If you're
expecting to use this in a cross platform environment, look elsewhere.