ModSecurity - ModSecurity is an Open Source web application firewall developed by Trustwave's SpiderLabs.
NetWrix Auditor - Configuration Auditing of IT Infrastructure
Barracuda Web Application Firewall - Barracuda Web Application Firewall offers security and DDoS protection against automated & targeted attacks.
LepideAuditor - LepideAuditor Suite - A change auditing software for Active Directory, GPO and Exchange Server.
F5 NGINX - F5 NGINX is a web application security solution that allows you to protect your applications, APIs, and customer data across cloud servers, on-premises data centers, and architectures.
ManageEngine ADAudit - ManageEngine ADAudit is a real-time windows active directory auditing tool.