| Attrition.org: Attrition is an eclectic collection of internet and computer security resources. |
| Crewl Underground Madness: Belgian group specialized in computer and network (in)security, hacking, coding and phreaking. |
| Cult of the Dead Cow: Offers blog, team background, tools and BackOrifice downloads, and news archive. |
| Digital Information Society: Exploit archive, phreaking information, and group member pages. |
| Eleventh Alliance: Offers details regarding select viruses, overflow and security exploits, bios tools, and crytography. Also features book reviews on assembly programming and computer security. |
| enZo: Coding group. Offer hacking tools and vulnerability exploits. |
| HackHull: Group of hackers in the United Kingdom. Information about meetings, projects, and links to personal pages. |
| HATE (Hackers Against Tyranny Everywhere): Anarchy, HAcking, Phreaking files for newbies. |
| Moloch Industries: A New York hacker group. |
| Nomad Mobile Research Centre: Hacker lab engaged in vulnerabilities research. Security papers, full disclosure advisories and current projects. Also features a FAQ on hacking techniques. |
| Progenic Security: Security advice and exploits. |
| Pulhas WebSite: A collection of current hacker news articles. |
| Razor: Team of security researchers. Features news, original papers and advisories, presentations they have given, and tools they have written. |
| Synnergy Networks: Security research site with quality papers and exploits |
| Toxyn Technologies, Inc.: Hacking related group. |
| Twentythreedotorg: SoCal's hacking group. Canadian free since 1999. |
| TwistedinterneT ServiceS International Inc.: Underground Hacker site with an extensive archive and library. |
| Xfocus: Organization dedicated to the research and demonstration of vulnerabilities in network services and communication security. Offers papers, security tools, exploit code, advisories and a discussion forum. |
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