Submit RSS feed in multi Search engine

(1)  http://tools.950buy.com/rss-submit/

(2) http://pingomatic.com/

(3) http://www.hostned.com/resources_site_submit.htm

(4)  http://www.ping.in/index.php

(5) https://pingler.com/

(6) http://www.mypagerank.net/service_pingservice_index

(7) http://www.twingly.com/ping