To getting more and more traffic and back links blogger now use many techniques RSS feed submission is one of them. Whatever blogging platform you use every platform offer RSS feed. RSS feed directory is the best place for long term traffic. RSS feed directory can improve your blog SERP rank. So submitting feed on RSS feed directory sites is essential for any blog.
All of this RSS feed directories are active and free to use. So go there add your blog free and bring traffic and back links. If you know any other website which not listed here, let me know in comment. I would love to add that in my list.