conlabz GmbH

With the WP Bookmarks Plugin by conlabz you can bookmark your favorite websites within WordPress. It adds a custom post type called ‘bookmark’, so you can easily manage your bookmarks as you know it from native posts, like tagging and arranging in categories. You can either add bookmarks via your WordPress Backend or place the provided bookmarklet in your browser’s bookmark bar and add a WP Bookmark right from the website you want to bookmark.
Features:
<ul>
<li>Native use and management, that you know from posts</li>
<li>Tagging Bookmarks</li>
<li>Arranging bookmarks in hierarchical categories</li>
<li>Save your bookmarks as draft</li>
<li>Write a few lines about your bookmark in the description area</li>
<li>Language Support for English and German</li>
</ul>

WP Bookmarks

WP Bookmarks adds a special post type to your WordPress installation, that you can use for bookmarking your favorite websites.

dalziel

Provides the ability to have a bookmarklet on your browser that will let you add any page as a link on your blog. 
Replaces the functionality of the Add Link bookmarklet that was removed in WordPress 2.5. For more information 
on what a bookmarklet is and how to use them see <a href="http://www.bookmarklets.com/" rel="nofollow ugc">bookmarklets.com</a>

Link This Bookmarklet

Provides the ability to have a bookmarklet on your browser that will let you add any page as a link on your blog.

WP Bookmarks vs Link This Bookmarklet