Nur Hasan

WPBookmark is a wordpress plugin that allows users to bookmark posts/pages. 
you can selectively disable bookmarking feature on certain pages/posts.
Major new features in wpbookmark include:
<ul>
<li>user can maintain his own custom list of bookmarked posts or pages.</li>
<li>site owner can explicitly mention which pages/posts user can add to his/her bookmark list.</li>
</ul>
<h4>Pro Version</h4>
Pro Version includes some extra features and allows customization. Features include: 
1. Bookmark button position can be adjusted. 
2. Button color can be adjusted. 
3. Admin can monitor which pages/posts were bookmarked the most from admin dashboard. 
4. Admin can easily notify group of users who liked/bookmarked a post/page through email. 
5. Emailing can be queued to be delivered on a later time.
<ul>
<li>Go to: http://www.binnash.com/wpbookmark-pro/ to get the pro version</li>
</ul>

WPBookmark

WPBookmark is a wordpress plugin that allows users to bookmark posts/pages. you can selectively disable bookmarking feature on certain pages/posts.

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.

WPBookmark vs Sociable Zyblog Edition