Ping-O-Matic is a service to update different search engines that your blog has updated.
2. My Pagerank
Submit Free lets you submit URL to popular search engines from one Mypagerank.net
Promote your blog with TotalPing!
4. Feed Shark
Ping your blog, feed, or podcast for free!
PingMyBlog.com is a service which does the hard work for you.
Use Pingler.com to Ping your Blogs and Websites in the best way possible!
Automates Ping Blog and Podcast for Free.
Pingates is a service that pings or notifies a number of services that keep track of weblogs and publish them.
9. Feed Ping
Feed Ping Website Blog Ping RSS Service Webmaster Tools.
Ping.IN is a blog ping service that pings or notifies Weblog Services such as Blog Search Engines and blog directories that your blog has been updated.