Adding your website or URL on several search engines is quiet difficult if you do it mannually. But iam going to give you various links with the help of which you can submit your website on several serach engines just by a single click. Its is totally free only these website asks you to put their given link on your website which i think is not a big deal .... You can find these websites below...
1) www.allsitecafe.com/submitter/submit.html
2) http://www.submissionurl.com/
3) http://www.dreamsubmit.net/
4) http://www.submitexpress.com/
5) http://www.scrubtheweb.com/addurl.html
6) http://www.addme.com/submission/free-submission-start.php