Delicious – The unofficial WordPress Plugin Directory

addtothis

Providing option for bookmarking your blog post in stumble,technorati ,delicious and digg

Lets you import your Delicious bookmarks into WordPress as links, posts, or a custom post type.

Makes available a widget to display your recent links tagged with delicious.

del.icio.us for WordPress displays your latest del.icio.us bookmarks in your WordPress blog.

Selectively add social network buttons to your posts, or theme design.

Adds buttons that let your visitors share your content on social media sites.

Tilt Social Share Widget allows your users to quickly share your content on social sites. View "Description" tab for available services.