johnlawrence

PopuList allows you to track the popularity of your posts on social bookmarking sites reddit, stumbleupon, del.icio.us and digg. When PopuList is activated, a page is added to your dashboard giving the number of times a page has been saved or upvoted.
New in version 1.5 PopuList now also lets you view backlinks as indexed by Google and Yahoo.

Populist

Track the popularity of your posts on social bookmarking sites reddit, stumbleupon, del.icio.us and digg

Gombos Robert

A simple and light plugin to add social bookmarks buttons to post and pages. I’m focusing in collecting non-english bookmarks services.

Bookmark Me

Bookmark Me is a plugin to add bookmark buttons (even non english bookmark sites) to your post or page.

Populist vs Bookmark Me