[Discover] The CRM114 Discriminator - The Controllable Regex Mutilator http://crm114.sourceforge.net/
(sysadmin spam text regexes) 
[Discover] Better Bayesian Filtering http://www.paulgraham.com/better.html (antispam email filtering whitepaper)
[Discover] netfilter/iptables project homepage http://netfilter.org/ (network filtering tools linux)
[Discover] Wikitravel:Local spam blacklist http://wikitravel.org/en/Wikitravel:Local_spam_blacklist (email blacklist spam filter)
[Discover] Vipul's Razor: home http://razor.sourceforge.net/ (antispam collaboration email tool)
[Discover] KamensPaper.pdf (application/pdf Object) http://www.fogcreek.com/FogBugz/Downloads/KamensPaper.pdf (email algorithm analysis classification)
[Discover] D-Link® Launches SecureSpot All-In-One Internet Security Device For Home And Small Office Networks http://www.dlink.com/press/pr/?prid=259 (server proxy family dlink)
[Discover] United States Patent Application: 0040210640 http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FP ... (godaddy spam filter patent)
[Discover] HTTP Packet Capturing to debug Apache http://www.askapache.com/tools/sniff-http-to-debug-apache-htaccess-and-httpdconf.html (network capture http packet)
[Discover] StupidFilter :: Main / HomePage http://stupidfilter.org/main/index.php (stupidity tools security opensource)
[Discover] Better Bayesian Filtering http://www.paulgraham.com/better.html (antispam email filtering whitepaper)
[Discover] netfilter/iptables project homepage http://netfilter.org/ (network filtering tools linux)
[Discover] Wikitravel:Local spam blacklist http://wikitravel.org/en/Wikitravel:Local_spam_blacklist (email blacklist spam filter)
[Discover] Vipul's Razor: home http://razor.sourceforge.net/ (antispam collaboration email tool)
[Discover] KamensPaper.pdf (application/pdf Object) http://www.fogcreek.com/FogBugz/Downloads/KamensPaper.pdf (email algorithm analysis classification)
[Discover] D-Link® Launches SecureSpot All-In-One Internet Security Device For Home And Small Office Networks http://www.dlink.com/press/pr/?prid=259 (server proxy family dlink)
[Discover] United States Patent Application: 0040210640 http://appft1.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=1&u=%2Fnetahtml%2FP ... (godaddy spam filter patent)
[Discover] HTTP Packet Capturing to debug Apache http://www.askapache.com/tools/sniff-http-to-debug-apache-htaccess-and-httpdconf.html (network capture http packet)
[Discover] StupidFilter :: Main / HomePage http://stupidfilter.org/main/index.php (stupidity tools security opensource)