Denis Lam

<p>WordPress generates shortlinks for your posts and pages. By default it uses the <code>?p=</code> with the post ID added to it, but if you have a rather long domain name this isn’t very useful. If you use <a href="http://bit.ly" rel="nofollow ugc">Bit.ly</a>, this plugin will help you replace the shortlink WordPress generates with a proper Bit.ly shortlink.</p>
<p>This plugin uses the latest Bit.ly OAuth 2 draft specification API instead of its deprecated V3 API and enables you to use generic access token to automatically enable Bit.ly shortlinks in your entire multisite network without the need for each site user to have to tinker with any settings or authentication configurations.</p>


Bit.ly Shortlinks Multisite (Uses OAuth 2 API)

This plugin replaces the default WordPress shortlinks with Bit.ly shortlinks for your single site or multisite WordPress network.

virus-2k

<p>Currently this Plugin is in Development-Phase.</p>
<h4>You need at least PHP v5.3.0 in order to use this Plugin!</h4>
<h4>Attention JavaScript Users</h4>
<p>This Plugin will <em>install</em> jQuery on the Blog.</p>
<ul>
<li>If you use another Javascript Plugin you should not use this Plugin.</li>
<li>If you already have included jQuery on your Blog remove it first if you activate this Plugin</li>
<li>The latest jQuery Version will be included via Google Code</li>
</ul>


RIYUK

Shortens every Post with Bitly. Youtube scroller integration like Facebook. Requires & Loads jQuery

Bit.ly Shortlinks Multisite (Uses OAuth 2 API) vs RIYUK