Social Bookmarks adds icons to your posts and/or pages that allow your visitors to easily submit them on social bookmarking and network sites.
This plugin inserts social share links at the top or bottom of each post.
This plugin enhances the WordPress comments by incorporating Twitter and Social Bookmarking systems(Hatena, Delicious, FriendFeed, livedoor clip, Buzz …
Embedding Japanese major social bookmark services hyper links and icons
Get the Social bookmark info.