Yes, I agree with NICEGUY. You need any "relationship" with other sites and the search engines will even submit your website without you doing it yourself. You may also check your relationship with the other site, e.g in Google:
link:mareli.org - Find web pages that link to mareli.org
site:mareli.org - Find web pages from the site mareli.org
"mareli.org" - Find web pages that contain the term "mareli.org"
Mareli.org – Open Directory is created to help
webmasters submit their web sites for free. We give you the opportunity to
submit your web site in 2 different directories.