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...

multippt

This plugin displays several social bookmarking options in a dropdown. Unlike other social bookmarking displays, this does not cause clutter.
Whats new in 2.0
Version 2.0 features a new fresh look which is much easier to use and is extremely search engine friendly. Nonetheless, if you do not like the new layout, you can always use the old one via the administration panel. The new layout should go well with most layouts.
The new version also takes into consideration of non-JavaScript users and would downgrade gracefully to allow non-JavaScript users to utilize every other feature (exception of dropdown).
Integration with an external <a href="http://www.tevine.com/social/" title="Bookmark and Share API" rel="nofollow ugc">Social Bookmarking API</a> allows your blog users to enjoy all bookmarks that are available even if you have not upgraded your plugin past version 2.0.
Supported Social Bookmarks
<ul>
<li>
BlinkBits
</li>
<li>
BlinkList
</li>
<li>
BlogLines
</li>
<li>
BlogMarks
</li>
<li>
Buddymarks
</li>
<li>
BumpZee
</li>
<li>
CiteULike
</li>
<li>
Co.mments
</li>
<li>
Del.icio.us
</li>
<li>
Digg
</li>
<li>
Diigo
</li>
<li>
Facebook
</li>
<li>
Fark
</li>
<li>
Faves
</li>
<li>
Feed Me Links
</li>
<li>
Furl
</li>
<li>
Gravee
</li>
<li>
Google Bookmarks
</li>
<li>Hugg</li>
<li>
Jeqq
</li>
<li>
Linkagogo
</li>
<li>
Ma.gnolia
</li>
<li>
Mister Wong
</li>
<li>
NetVouz
</li>
<li>
Newsvine
</li>
<li>
OnlyWire
</li>
<li>
Propeller
</li>
<li>
RawSugar
</li>
<li>
Reddit
</li>
<li>
Rojo
</li>
<li>
Simpy
</li>
<li>
Slashdot
</li>
<li>
Sphinn
</li>
<li>
Spurl
</li>
<li>
Squidoo
</li>
<li>
StumbleUpon
</li>
<li>
Taggly
</li>
<li>
Tagtooga
</li>
<li>
TailRank
</li>
<li>
Technorati
</li>
<li>
Windows Live
</li>
<li>
Yahoo MyWebs
</li>
</ul>
In addition, you can customize the order of the bookmarks or choose to remove some of them without editing a file.
If you do not like Dropdowns, this plugin has the ability to show the bookmarks without the dropdown – similar to what other plugins display.
Remember to read the readme file to ensure that you have done what is needed.
<h3>Updating</h3>
You can check what version the plug-in is at via visiting the <code>Options > Social Dropdown</code> panel.
<ol>
<li>
Deactivate the <code>Social Dropdown</code> plug-in. You may want to back-up your existing plug-in files just in case if there are any errors while updating.
</li>
<li>
Replace the files in the <code>social-dropdown</code> directory located in the WordPress plug-ins directory.
</li>
<li>
Re-activate the <code>Social Dropdown</code> plug-in from the administration dashboard.
</li>
</ol>
If you have modified the <code>GenerateAll()</code> function, copy the modified area and set <code>$overrideoptions</code> to <code>true</code> to preserve your changes. <code>$overrideoptions</code> can be found in <code>generatebookmarks.php</code>.
<h3>Requirements</h3>
<ol>
<li>
A working WordPress install
</li>
<li>
Your WordPress theme must contain a call to the <code>get_header()</code> function
</li>
<li>
Your WordPress theme must contain the WordPress loop
</li>
</ol>
Most WordPress installs and templates have these, so you need not worry about these.
To be able to use the dropdown, one must have JavaScript enabled in the browser.
Fortunately, users without JavaScript enabled will see a list of social bookmarks at where the dropdown is.
<h3>Customizing</h3>
Within <code>socialdropdown.php</code>, these are some areas you can edit to influence how the dropdown appears.
In the <code>GenerateAll()</code> function, you can re-arrange how the items appear, add new items or remove them (after setting <code>$overrideoptions</code> to <code>true</code>). You can already do this using the <code>Options > Social Dropdown panel</code>.
Creating bookmarks
Each social bookmark is generated using the <code>GenerateLink()</code> function, and the URLs used are created using the <code>GenerateURL()</code> function. The parameters are as followed: GenerateLink($type), where $type is the name of the social bookmark (e.g. Digg is represented as ‘digg’).
In order to add a new bookmark, add the following lines of code after an item [i.e. after <code>break;</code>] in the GenerateURL() function. An example is shown:
<pre><code>case '[name of social bookmarking site]':

?>

[URL to social bookmark page]

<?php

break;
</code></pre>
In this example, when you call <code>GenerateURL('yahoo')</code>, the link for this item is generated. The link is the direct link to the submitting URL, usually available as an API on the social bookmarking site. Within the URL, there is some PHP code. <code>the_title()</code> represents the post title, while <code>echo get_the_permalink()</code> represents the URL of the post.
Within <code>generatebookmarks.php</code>, find a variable called <code>$all</code>. Add ‘|[your bookmark name here]’ to the end of the string. For example, in the case of Yahoo, if $all contains “google”, then the result will be “google|yahoo”.
<h3>Credits</h3>
Several images are created or taken from the corresponding social bookmarking sites and edited to suit the plug-in. The dropdown javascript is taken from http://www.dynamicdrive.com/ and modified. The drag-drop library is provided by http://script.aculo.us/.

Social Dropdown

This plugin displays several social bookmarks in a dropdown. Unlike other social bookmarking displays, this does not cause clutter.

Easy Social Share vs Social Dropdown