Denis Lam

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.
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.

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.

danpai

D(ifferent)P(lace) URL Shortner is a WordPress Plugin designed to use the most popular URL shortening services. At this moment the only supported services are Bitly.com and Google URL Shortner.
There are 3 ways to generate and obtain a shortlink:
<ol>
<li>When you publish a post or a page</li>
<li>When you update a published post or page</li>
<li>
When you view a post or a page that use this code
<pre><code><?php echo wp_get_shortlink(); ?>
</code></pre>
</li>
</ol>
You can find the latest release on <a href="https://github.com/danpai/DPUrlShortner" rel="nofollow ugc">GitHub</a>

DP URL Shortner

D(ifferent)P(lace) URL Shortner is a WordPress Plugin designed to use the most popular URL shortening services.

Bit.ly Shortlinks Multisite (Uses OAuth 2 API) vs DP URL Shortner