PingtheSemanticWeb.com is a web service archiving the location of recently created/updated RDF documents on the Web. If one of those documents is created or updated, its author can notify PTSW that the document has been created or updated by pinging the service with the URL of the document.
Ping.fm is a simple service that makes updating your social networks a snap. we support over 30 social networking sites and we're adding more regularly.
Need a quick and easy way to share links and comments with your online followers? Start using the Social.com bookmarklet.
It takes just seconds to setup and you can send to Twitter, Delicious, and Ping.fm without leaving the page you are on.
This test will check a mail server IP address against 147 DNS based email blacklists. (Commonly called Realtime blacklist, DNSBL or RBL). If your mail server has been blacklisted, some email you send may not be delivered. Email blacklists are a common way of reducing spam.