PingCastle - Because the Active Directory security lies in the process and not in expensive tools, our solution is simple: download PingCastle and apply its methodology.
ARKAD - Active Directory Reporter - Reporting tool for Active Directory and Azure AD with built-in reports on Users, Contacts, Groups, Computers, Security, Tenants, Domains and Roles. Schedule AD Reports, export & email AD Reports to multiple users.
ManageEngine ADManager Plus - Unified Active Directory, Exchange, and Office 365 management and reporting solution.
Purple Knight - Purple Knight is a free Active Directory security assessment tool built and managed by an elite group of Microsoft identity experts.
Directory Manager - Directory Managers allows an authorized user (such as someone from Human Resources) to update other user's information in the Active Directory and thus the Exchange Global Address List.
JiJi Active Directory Reports - Active Directory Reports consists of 500+ out of box compliance reports.