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A virtual host scanner that performs reverse lookups, can be used with pivot tools, detect catch-all scenarios, work around wildcards, aliases and dynamic default pages.

🍯 Unobtrusive and flexible spam protection for Rails apps

Bareos is a cross-network Open Source backup solution (licensed under AGPLv3) which preserves, archives, and recovers data from all major operating systems.

Keep your sensitive information out of chat logs, emails, and more with encrypted secrets.

🔒 Enterprise-grade API gateway that helps you monitor and impose cost or rate limits per API key. Get fine-grained access control and monitoring per user, application, or environment. Supports OpenAI, Azure OpenAI, Anthropic, vLLM, and open-source LLMs.

A modular vulnerability scanner with automatic report generation capabilities.

Easily configure macOS security settings from the terminal.

Program to reverse Docker images into Dockerfiles

SSH-based "VPN for poors"

A pure Python HTML5 parser that just works. No C extensions to compile. No system dependencies to install. No complex API to learn.

A Game of Hackers (CTF Scoreboard & Game Manager)

Automated System Hardening Framework

Modern Python library for HTTP security headers with safe defaults, configurable presets, and first-class ASGI/WSGI middleware (FastAPI, Django, Flask, Shiny, and more).

A security scanner for your LLM agentic workflows

Lonkero - Wraps around your attack surface. Professional-grade scanner for real penetration testing. Fast. Modular. Rust.

Sublert is a security and reconnaissance tool which leverages certificate transparency to automatically monitor new subdomains deployed by specific organizations and issued TLS/SSL certificate.

ClawKeeper: Comprehensive Safety Protection for OpenClaw Agents Through Skills, Plugins, and Watchers (aka The Norton for OpenClaw)

:key: Hash type identifier (CLI & lib)

Privacy-first, end-to-end encrypted Mail, Pages, Drive, and Calendar.

A laboratory for learning secure web and mobile development in a practical manner.

Generate links that users can use to submit messages encrypted with your public key.

🔑 Free Offline-first Password Manager

Enterprise-oriented Generic Proxy Solutions. Maintenance mode now, please switch to use [VEY](https://github.com/VEY-OSS/vey) for new development efforts

👩‍🏫 👨‍🏫 The open-source curriculum of Enki!

CodeGate: Security, Workspaces and Multiplexing for AI Agentic Frameworks

Damn Vulnerable NodeJS Application

Tenzir is the data pipeline engine for security teams.

Ronin is a Free and Open Source Ruby Toolkit for Security Research and Development. Ronin also allows for the rapid development and distribution of code, exploits, payloads, etc, via 3rd-party git repositories.

Security Bulletins that relate to Netflix Open Source

Kubernetes security notes and best practices