ektz

Black & White Social networking icons that matches every layout of wordpress. 
Easy to modify and flowless. More icon packs will be available soon. 
The icons right now are courtesy of <a href="http://icons.mysitemyway.com" rel="nofollow ugc"> MySiteMyWay </a>.

Randomattic Socialbookmarks

Black & White Social networking icons that matches every layout of wordpress. Easy to modify and flowless. more icon packs will be available soon.

goldenapples

This plugin aims to support community link-sharing, social bookmarking, and discussion of links in the WordPress environment.
This is still at an early stage of what I hope will be a much more ambitious project. If you want to try this out, please give me feedback.
I will guarantee backwards compatibility with all data saved by the plugin, so it should be safe to install and activate, and as I add features, your existing posts and links will work with them just fine.
See the plugin’s <a href="https://github.com/goldenapples/recommended-links/wiki" rel="nofollow ugc">wiki page on github</a> for more up-to-date documentation (its hard to keep documentation updated in multiple places).

Randomattic Socialbookmarks vs Recommended Links for WordPress