#1Tools for testing and implementing authentication mechanisms (e.g., MFA, SSO) and authorization policies.
Kitploit recommended

The Secure CommsOS™ for mission-critical operations
Open Source Identity and Access Management For Modern Applications and Services

Free universal database tool and SQL client

A tool for secrets management, encryption as a service, and privileged access management

Unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs

JumpServer is an open-source Privileged Access Management (PAM) platform that provides DevOps and IT teams with on-demand and secure access to SSH,…

The Symfony PHP framework

An open source, self-hosted implementation of the Tailscale control server

Certbot is EFF's tool to obtain certs from Let's Encrypt and (optionally) auto-enable HTTPS on your server. It can also act as a client for any…

Infisical is the open-source platform for secrets, certificates, and privileged access management.

The most comprehensive authentication framework

Checklist of the most important security countermeasures when designing, testing, and releasing your API

Provides open-source SSO and identity provider functionality with SAML, OAuth2/OIDC, LDAP, and RADIUS support for centralized authentication,…

The Single Sign-On Multi-Factor portal for web apps. OpenID Certified™ and Post-Quantum Cryptography Ready.

FreeRDP is a free remote desktop protocol library and clients

Sandboxed runtime for autonomous AI agents with declarative YAML policies enforcing filesystem, network, and process constraints, plus endpoint-bound…

Secure tunneling daemon implementing VPN protocols with TLS encryption, certificate authentication, and routing/firewall configuration for private…

Authorization library enforcing ACL, RBAC, ABAC, and custom access-control models with RESTful matching and policy management APIs for applications…