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.

wanakijiji

Hatena Connectは、はてなブックマークとWordpressブログを結びつけるプラグインです。 
はてなIDを設定すると、このWordpressブログがブックマークされた際に以下のサービスに通知が届きます。
<ul>
<li>はてなサイトの「あなたへのお知らせ」</li>
<li>はてなアプリの「通知」</li>
<li>Chrome拡張機能の「はてなのお知らせ」</li>
</ul>
Hatena Connect connects your wordpress blog with Hatena. 
You’ll get notifications on the following service when someone bookmarks your wordpress blog.
<ul>
<li>“Notifications for you” on Hatena Website</li>
<li>“Notifications” on Hatena App</li>
<li>“Hatena Notify” Chrome Extension</li>
</ul>

Hatena Connect

Connect your wordpress blog with Hatena to get notifications on Hatena website, app, chrome extension.

WPBookmark vs Hatena Connect