Plug Sites

iplugs.org - A plug site, plug yourself!
Plugboard.org - Home of the Plugboard. Download the most recent version of the script here.
Plugger's Lair - Plugger's Lair is where pluggers meet and plug their site. Promote their sites for free.
Pluggy.info - Another typical plug site, come plug your site and get traffic, i'm always looking for affiliates :)
Pluglandia - Promote your sites here.
SD Plug - A plug site that also offers advertising.