http://www.feedplex.com/add-url.php
http://www.rss-network.com/submitrss.php
http://technorati.com/ (Requires registration) after login add your blog here: http://technorati.com/account/claim/
http://www.2rss.com/index.php (add RSS feed is the bottom of the page)
http://en.newsxs.com/Suggest/
http://www.feeds4all.nl/_NF.aspx
http://www.jordomedia.com/RSS/l_op=Addrss.html
http://www.feedbomb.com//suggest.php?action=addlink
http://www.rssmicro.com/feedsubmit.web
http://www.feedage.com/submit.php (requires registration)
http://www.rssmotron.com/feed_submission.php
http://www.feedplex.com/add-url.php

P.S. If you have a rss feed link for developers you can also submit it to our dev feeds directory HERE.

P.S.S. If you find that some of the links above is no longer available or you know another rss feed directory, please, post a comment about the link and I’ll update the post