GTCop Professional Security Appliance aims to provide a powerful tool for satellite communications, with enhanced QoS and bandwidth controls. As derived from IPCop Firewall, it is a stable, secure, easy to configure and maintain GNU/Linux firewall box.
3ff aims to provide a full features gateway for home or small office use. This distro is totaly modular and try to be secure as possible.
The Hackers Lab is aimed to provide hackers, system audits, system and server and network administrators with applications to secure their own servers.
TSIC is a comprehensive solution for secure Internet connection against all kinds of threats and harmful programs for Windows platforms and ReactOS. It's features include a built-in FIREWALL,IDS,Parental and privacy Control and also antivirus.
Libconnect is a simple library wrapper written in assembly language that intercepts the calls applications make to establish TCP connections and transparently proxies them as necessary.
The TruongQuangDuocIDS (tqdids) is an IDS that works on multi-platform, from Solaris/SPARC to HP-UX/Alpha. This IDS has features like other IDSs (snort etc.) but it has a special feature inside the binary-pattern-matching algorithm that makes it faster.