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

Jason

NOTE: This plugin requires Theme Blvd framework v2.2.1+
In a nutshell, this plugin provides that infamous “Unlimited Sidebars” feature all the cool kids are asking for with your Theme Blvd theme.
When using a Theme Blvd theme, this plugin will allow to create custom widget areas for any of your theme’s specific widget area locations. Custom widget areas can be created for specific locations and then assigned to pages throughout your website. Additionally, custom widget areas can be left as “floating” (i.e. no location) and then be inserted within dynamic areas such as elements of the <a href="https://wordpress.org/extend/plugins/theme-blvd-layout-builder" rel="ugc">Layout Builder</a>, for example.
Custom widget areas have two attributes to understand when being setup.
<ol>
<li>Location: The location is where the widget area is on the page. Examples would be Right Sidebar, Left Sidebar, Ads Above Content, etc.</li>
<li>Assignments: The assignments are where a particular custom widget area will then be displayed on your website. The assignments can be specific pages, posts, archives, and various other pre-set WordPress conditionals. Additionally, advanced users can input their own custom <a href="https://codex.wordpress.org/Conditional_Tags" rel="nofollow ugc">conditional statements</a> within their widget area assignments.</li>
</ol>
NOTE: For this plugin to do anything, you must have a theme with Theme Blvd framework v2.2+ activated.

Theme Blvd Widget Areas

When using a Theme Blvd theme, this plugin extends the framework's widget area system.

WUI: Widgets User Interface vs Theme Blvd Widget Areas