I was the first Internet consultant to the general public in my town, starting in 1994. I also started doing SEO for others around 2000. The online source that I have been using to submit to search engines for a long time recently went down, and believe it or not it was free. It was located in an obscure country somewhere
What are people using now, that is, May 2016? I know these things seem to change every year, at least new ones come in.
I don't want to argue the benefits of submitting to search engines, i'm just looking for something that will.