Goran Petrovic

This utility plugin allow you to bookmark your site in admin bar.
This plugin is very useful if you have several, local or online, WordPress instalations.You can set up all sites admin bar, from one point.
So, you can jump fast from WP admin to WP admin.
Features
<ul>
<li>Fast jump from WP to WP </li>
<li>Global register sites</li>
</ul>

WP Jump

This plugin automatically add links on your posts to popular social bookmarking sites. 
It is an enhanced version of Peter Harkins Sociable plugin.
<h4>Supported Bookmarking Services</h4>
100 social bookmarking services are included! Supported services are:
Ask, BarraPunto, BlinkList, Bloglines, Blogosphere News, Blogsvine, Book.mark.hu, Colivia, DZone, De.lirio.us, Design Float, Digg, DotNetKicks, Facebook, Fark, Folkd, Furl, Gamebuzz, Global Grind, Google Bookmarks, Gwar, Haohao, HealthRanker, Hemidemi, Hype, Internetmedia, Kirtsy, Klickts, LinkaGoGo, Linkarchiv, Linkarena, LinkedIn, Linkter, Live-MSN, Lufee, Meneame, MisterWong, Mixx, MyShare, MySpace, MyTagz, N4G, Netscape, Netselector, Netvouz, NewsVine, Newsrider, NuJIJ, Oneview, Print, Ratimarks, Readster, Reddit, Rojo, SEOigg, SalesMarks, Scoopeo, Segnalo, Simpy, Slashdot, Smarking, Social-Bookmarking.dk, Socializer, Socialogs, SphereIt, Squidoo, StumbleUpon, Technorati, ThisNext, Twitter, Upnews, VoteForIt, Webbrille, Weblinkr, Webnews, Webride, Wikio, Wikio DE, Wikio ES, Wikio FR, Wikio IT, Wikio UK, Wists, Wykop, XING, Xerpi, Y!GG, YahooBuzz, YahooMyWeb, blogmarks, blogtercimlap, co.mments, connotea, del.icio.us, eKudos, email, feedmelinks, newskick, scuttle, seekXL

Sociable Zyblog Edition

Automatically add links on your posts to popular social bookmarking sites.

WP Jump vs Sociable Zyblog Edition