Submit Express is a good choice for URL free submission
In order to submit your website URL to 70+ top search engines for free, including Google, then use this link to Submit Express web or simple click this button .
Please do not submit your URL more than once a month. Multiple submissions of the same URL to some search engines could be considered spamming and therefore may ban you from being listed.
Note: Always submit the main page of your site only. The rest of your site will be crawled by the search engines.