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.
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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.

oneline

A Simple plugin which adds a widget to your wordpress admin widget area which you can then assign to the side bar etc… features are as follows:
Allows you to set your user / social ID’s 
Allows you to switch from icons or text links 
Allows you to turn social button / links on or off
Supported Social Sites:
Facebook 
Twitter 
Linkedin 
RSS

Easy Social Share

A Simple plugin which adds a widget to your wordpress admin widget area which you can then assign to the side bar etc...

Hocus Pocus Buttons vs Easy Social Share