Well Jones, I didn't use any software like this not b'coz I didn't found it, because I don't want to use, reason is, that kind of technique is called spamming best thing is do manually, If you don't have time for that then hire one person who can do this for you.
Just check this link you will find the list of rss submission directory. http://rss-specifications.com/rss-submission.htm
just search in google I have seen that software before, if im not mistaken the name is blogblaster....but im not using that kind of software...its spamming and everyone hates spam.