Ping is a social bookmark: you save your page on a public list.
Sites where you submit by creating a profile
You create a public profile, then point it at your product URL.
863 destinations
Pinterest is a social bookmark: you save your page on a public list.
Pixabay is a public profile site: you create an account and point it at your website URL.
Pixiv is a public profile site: you create an account and point it at your website URL.
Plime is a social bookmark: you save your page on a public list.
Plugim is a social bookmark: you save your page on a public list.
Plurk is a social bookmark: you save your page on a public list.
Pocket is a social bookmark: you save your page on a public list.
Podbean is a public profile site: you create an account and point it at your website URL.
Podchaser is a public profile site: you create an account and point it at your website URL.
Podomatic is a public profile site: you create an account and point it at your website URL.
Polyvore is a social bookmark: you save your page on a public list.
Popurls is a social bookmark: you save your page on a public list.
Posted is a social bookmark: you save your page on a public list.
Postolia is a social bookmark: you save your page on a public list.
Prbookmarks is a social bookmark: you save your page on a public list.
Propeller is a social bookmark: you save your page on a public list.
Pubchase is a social bookmark: you save your page on a public list.
Pusha is a social bookmark: you save your page on a public list.
Quora is a forum. The usual path is a profile or signature that points to your site.
Raindrop is a social bookmark: you save your page on a public list.
Ratimarks is a social bookmark: you save your page on a public list.
Rawsugar is a social bookmark: you save your page on a public list.
Readablog is a social bookmark: you save your page on a public list.
What a profile submission usually requires
Expect an account, a bio, and sometimes a badge or reciprocal link. A busy community profile can still be worth the time when the link is nofollow.