Andrew Norcross

Creates a YOURLS generated shortlink on demand or when saving posts.
Features:
<ul>
<li>Optional custom keyword for link creation.</li>
<li>Will retrieve existing URL if one has already been created.</li>
<li>Click count appears on post menu</li>
<li>Available for standard posts and custom post types.</li>
<li>Optional filter for wp_shortlink</li>
<li>Built in cron job will fetch updated click counts every hour.</li>
</ul>

YOURLS Link Creator

Creates a custom short URL when saving posts. Requires your own YOURLS install.

TomHarrigan

This version requires Buddypress and YOURLS url shortener. Add tweet buttons to activity stream posts allowing users to ‘tweet’ the item. Shorten urls with your own custom YOURLS shortener. Other Url shortening services being added soon.

BuddyPress Tweet Urls

Adds custom tweet button to BuddyPress sites using YOURLS.

YOURLS Link Creator vs BuddyPress Tweet Urls