Directories

Alexander Geschonneck's Security Site - Collection of links to security resources, includes links to Lotus Domino and SAP R/3 security information.
http://geschonneck.com/

The Laughing Bit - Collection of links to information on Windows NT and Checkpoint Firewall-1 security.
http://www.tlb.ch/

New Order - Directory of cryptography, general security information and hacking sites.
http://neworder.box.sk/codebox.links.php

SecurityDocs - Directory of information security articles, white papers, and documents.
http://www.securitydocs.com/

E-Evidence Information Center - Directory of material relating to all aspects of digital forensics and electronic evidence.
http://www.e-evidence.info

SecureRoot - Hacking and security related links. Also offers discussion forums.
http://www.secureroot.com/

Safe World - Directory of links to downloadable security software. Brief descriptions for each.
http://soft.safeworld.info/

Packet Storm - Security information portal. Offers database of advisories, exploits, tools, papers and security news.
http://www.packetstormsecurity.org/

CERIAS Hotlist - Directory of information security related tools and resources.
http://www.cerias.purdue.edu/tools_and_resources/hotlist/

Itzalist - Computer resources offering antivirus software, current virus news, antivirus patches, online protection, security software and other information about computer security.
http://www.itzalist.com/com/computer-security/index.html