Active Directory Lightweight Directory Service (AD LDS)

An implementation of LDAP protocol for AD DS

Active Directory Certificate Services (AD CS)

Establishes an on-premises public key infrastructure
Create, validate and revoke public key certificated for internal users

Active Directory Federation Services (AD FS)

SSO service so users may use several web-based services network resources using only one set of credentials stored at a central location

Active Directory Rights Management Services (AD RMS)

Server Software for information rights management. Shipped with Windows Servers
Uses encryption and a form of selective functionality
Denial for limited access to documents