chrisguitarguy

Arbitrary Sidebars allows you to add widget areas via an page in the WordPress admin area. What you do with those sidebars on the front end is up to you and your theme.
This plugin requires PHP 5.3+. Please check your server configuration before installing.
Some use case ideas:
<ul>
<li>The end user wants to associate sidebars with individual posts and pages. This plugin ould provide half that functionality: easily creating widget areas.</li>
<li>You need reusable content blocks and want to take advantage of the widget system.</li>
</ul>

Arbitrary Sidebars

inconver

You can add new sidebars in the admin panel and edit them.
You can add new types of widgets and edit them. 
Also, you can add custom fields for new types of widgets. 
And you can create a unique template for each new type of widget.
Video tutorial: <a href="http://inconver.com/wui/" rel="nofollow ugc">http://inconver.com/wui/</a>

WUI: Widgets User Interface

Plugin for creating new sidebars for the site and new types of widgets with the custom fields

Arbitrary Sidebars vs WUI: Widgets User Interface