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SimpleX - the first messaging network operating without user identifiers of any kind - 100% private by design! iOS, Android and desktop apps 📱!

Get Android app updates straight from the source.

Daemon to ban hosts that cause multiple authentication errors

DOMPurify - a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. DOMPurify works with a secure default, but offers a lot of configurability and hooks. Demo:

Wazuh - The Open Source Security Platform. Unified XDR and SIEM protection for endpoints and cloud workloads.

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

The ZAP by Checkmarx Core project

CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

World's most advanced database DevSecOps solution for Developer, Security, DBA and Platform Engineering teams. The GitHub/GitLab for database DevSecOps.

OpenVPN is an open source VPN daemon

How to improve NGINX performance, security, and other important things.

一款内网综合扫描工具，方便一键自动化、全方位漏扫扫描。(An intranet comprehensive scanning tool, enabling one-click automated, all-round vulnerability scanning)

OpenSnitch is a GNU/Linux interactive application firewall inspired by Little Snitch.

OWASP Juice Shop: Probably the most modern and sophisticated insecure web application

Nmap - the Network Mapper. Github mirror of official SVN repository.

Exploitation Framework for Embedded Devices

Free cross-platform password manager compatible with KeePass

Firefox privacy, security and anti-tracking: a comprehensive user.js template for configuration and hardening

Universal Radio Hacker: Investigate Wireless Protocols Like A Boss

Scapy: the Python-based interactive packet manipulation program & library.

Agent-less vulnerability scanner for Linux, FreeBSD, Container, WordPress, Programming language libraries, Network devices

This is a collection of tutorials for learning how to use Docker with various tools. Contributions welcome.

Netmaker makes networks with WireGuard. Netmaker automates fast, secure, and distributed virtual networks.

The best IP Toolbox. Check your IP address & geolocation, test IP for WebRTC and DNS IP leaks, run an IP quality check, browser fingerprint check, website availability check, network speed test, global latency test, MTR test, Whois search, and more.

🛡️ Open-source and cloud-native Web Application Firewall (WAF)

This guide details creating a secure Linux production system. OpenSCAP (C2S/CIS, STIG).

Automated penetration testing & attack surface management platform. Recon, scan, exploit, report — 600+ exploits, 90+ integrations, 10K+ detections.

Low code web framework for real world applications, in Python and Javascript

Open Cyber Threat Intelligence Platform

The Web Security Testing Guide is a comprehensive Open Source guide to testing the security of web applications and web services.