hrosenhagen

Hocus Pocus Buttons is a WordPress-Plugin that provides sidebar widget with a widerange set of buttons for social bookmarking websites. However each button is only visible to the user if he has visited the corresponding site lately.
The goal is not to disturb the user by using too many buttons / links (since he could probably only use one or two at all) and rather only show relevant services.
<h3>More</h3>
For information about the use of this plugin visit the <a href="http://www.interessante-zeiten.de/goodies/hocus-pocus-buttons-wordpress-plugin" rel="nofollow ugc">plugin page</a>

Hocus Pocus Buttons

Automagically show or don't show buttons/links for social bookmarking sites, depending on the sites the user has visited lately.

Lopo Lencastre de Almeida

Allow your readers to convert your post permalink to a shorten sm00shed one and include it in their’s favorite social or blog site. WordPress 2.6 or above and Sociable 3.4.1 or above is required, if you use an older version of those, please upgrade.
More info:
<ul>
<li>More info on <a href="http://yoast.com/wordpress/sociable/" rel="nofollow ugc">Sociable</a>, with info on how to add sites to it, and how to integrate it into your WordPress in other ways.</li>
<li>Check out the other <a href="https://wordpress.org/extend/plugins/profile/ipublicis" rel="ugc">WordPress plugins</a> by the same author.</li>
</ul>

sm00sh for Sociable

Allow your readers to convert your post permalink to a shorten sm00shed one and include it in their's favorite social or blog site.

Hocus Pocus Buttons vs sm00sh for Sociable