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

Automattic

WooThemes

Matt Cohen

With WooSidebars, it’s possible to change the widgets that display in a sidebar (widgetized area) according to a context (for example, a specific page, a specific blog post, certain categories or the search results screen). Setting up a custom widget area to display across multiple conditions is as easy as a few clicks.
Looking for a helping hand? <a href="https://woocommerce.com/documentation/plugins/woosidebars/" rel="nofollow ugc">View plugin documentation</a>.
Looking to contribute code to this plugin? <a href="https://github.com/woocommerce/woosidebars/" rel="nofollow ugc">Fork the repository over at GitHub</a>. Please also read the CONTRIBUTING.md file, bundled within this plugin.

WooSidebars

WooSidebars adds functionality to display different widgets in a sidebar, according to a context (for example, a specific page or a category).

WUI: Widgets User Interface vs WooSidebars