Portmaster: Open-source application firewall

Portmaster is a free and open source application firewall built to monitor and control network activity on Windows and Linux. The project is developed in the EU and is... Read more »

Hottest cybersecurity open-source tools of the month: November 2025

This month’s roundup features exceptional open-source cybersecurity tools that are gaining attention for strengthening security across various environments. Heisenberg: Open-source software supply chain health check tool Heisenberg is an... Read more »

DeepTeam: Open-source LLM red teaming framework

Security teams are pushing large language models into products faster than they can test them, which makes any new red teaming method worth paying attention to. DeepTeam is an... Read more »

Tor Project is rolling out Counter Galois Onion encryption

People who rely on Tor expect their traffic to move through the network without giving away who they are. That trust depends on the strength of the encryption that... Read more »

cnspec: Open-source, cloud-native security and policy project

cnspec is an open source tool that helps when you are trying to keep a sprawling setup of clouds, containers, APIs and endpoints under control. It checks security and... Read more »

Metis: Open-source, AI-driven tool for deep security code review

Metis is an open source tool that uses AI to help engineers run deep security reviews on code. Arm’s product security team built Metis to spot subtle flaws that... Read more »

Product showcase: Proton Pass, a password manager with identity protection

Managing passwords can be a real headache, and it’s still common to fall back on reusing them or storing them in a browser without much protection. Proton Pass, built... Read more »

Strix: Open-source AI agents for penetration testing

Security teams know that application flaws tend to show up at the worst time. Strix presents itself as an open source way to catch them earlier by using autonomous... Read more »

ProxyBridge: Open-source proxy routing for Windows applications

ProxyBridge is a lightweight, open-source tool that lets Windows users route network traffic from specific applications through SOCKS5 or HTTP proxies. It can redirect both TCP and UDP traffic... Read more »

GNU Coreutils 9.9 brings fixes and updates across essential tools

GNU Coreutils is the backbone of many enterprise Linux environments. It provides the basic file, shell, and text utilities that every GNU-based system depends on. The latest release, version... Read more »
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