diff --git a/tools/security/auditing.md b/tools/security/auditing.md
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+# Auditing & Host Security Tools
+
+Security auditing, integrity monitoring, and privilege escalation detection.
+
+All entries follow → [TOOL-TABLE-SCHEMA.md](../../TOOL-TABLE-SCHEMA.md)
+
+| Name | Vendor/Webpage | GitHub Repo | Brief Description | Tags | Latest Commit | Creation Date | Stars |
+|------|----------------|-------------|-------------------|------|---------------|---------------|-------|
+| OSSEC | https://www.ossec.net | https://github.com/ossec/ossec-hids | Host-based intrusion detection and file integrity monitoring. | hids, audit, fim | Active | 2008 | High |
+| Lynis | https://cisofy.com/lynis | https://github.com/CISOfy/lynis | Security auditing and hardening scanner for Linux/Unix. | audit, hardening, compliance | Active | 2007 | 15k+ |
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diff --git a/tools/security/system-hardening.md b/tools/security/system-hardening.md
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+# System Hardening & MAC
+
+**Mandatory Access Control**, automated hardening frameworks, and related security tools.
+
+All entries follow → [TOOL-TABLE-SCHEMA.md](../../TOOL-TABLE-SCHEMA.md)
+
+| Name | Vendor/Webpage | GitHub Repo | Brief Description | Tags | Latest Commit | Creation Date | Stars |
+|------|----------------|-------------|-------------------|------|---------------|---------------|-------|
+| SELinux | https://selinuxproject.org | https://github.com/SELinuxProject/selinux | Flexible Mandatory Access Control (MAC) system in Linux kernel. | mac, hardening, kernel, linux | Active | 2000s | High |
+| AppArmor | https://apparmor.net | - | Proactive protection via per-program profiles. | mac, hardening, linux | Active | 2006 | High |
+| grapheneX | https://github.com/grapheneX/grapheneX | https://github.com/grapheneX/grapheneX | Automated system hardening framework. | hardening, automation, devsec | - | - | 1.1k |
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diff --git a/tools/sysadmin-devops/clients-inspectors/database-clients.md b/tools/sysadmin-devops/clients-inspectors/database-clients.md
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+# Database Clients & Query Tools
+
+Universal and specialized CLI clients for databases.
+
+All entries follow → [TOOL-TABLE-SCHEMA.md](../../TOOL-TABLE-SCHEMA.md)
+
+| Name | Vendor/Webpage | GitHub Repo | Brief Description | Tags | Latest Commit | Creation Date | Stars |
+|------|----------------|-------------|-------------------|------|---------------|---------------|-------|
+| usql | https://github.com/xo/usql | https://github.com/xo/usql | Universal command-line interface for SQL databases. | sql, cli, universal | Active | - | High |
+| pgcli | https://github.com/dbcli/pgcli | https://github.com/dbcli/pgcli | Postgres CLI with autocompletion. | postgres, cli | Active | - | High |
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