
| Email Riddler obfuscate your email |
| Akismet A collaborative effort to make comment and trackback spam a non-issue. (wordpress plugin) |
| Auto-close comments Wordpress plugin to close comments on old posts, avoiding spam. |
| Bad Behavior 2 Wordpress plugin, analyzes HTTP request to kill spam |
| Spam Karma Another WP plugin to eat Spam |
| Spam Huntress Blog about fighting Spam |
| SpamAssassin Open-source spam filter (from Apache) |
| CAUCE Coalition Against Unsolicited Commercial Email |
| SPF is broken sender policy framework is harmful |