affilisites

The floating widgets plugin makes it easy to add a widgetized area right above or beside your main content regardless of which theme you are using. You can have full control of where and how your widgets are displayed without having to edit your theme at all.
Position of the widget area – currently floating widgets can only be injected right before the “content” section of your site and can be set to “float” right or left so your content wraps around them. Future versions will make it possible to dynamically add widget areas to other sections of the page.

Floating Widgets

Adds a dynamic widget area to begining of post or page

GuyPrimavera

This open source and lightweight plugin allows users with the role Editor or Shop Manager to access the Menus and Widgets areas of the Appearance menu in WordPress’ admin area.
This is a common task that would be useful for clients to manage themselves to give them more control over their website’s content.
This plugin also gives access to the Customize submenu and other theme options, but these can be hidden through the options page at Appearance > Editor Access if you wish.
You can also select other menus to hide from Editors and Shop Managers (e.g. custom theme or plugin options pages), as well as hiding any elements on the Admin Bar.
Features
<ul>
<li>Allow access to Customize, Menus and Widgets for Editors and Shop Managers.</li>
<li>Theme Options remain hidden from these user roles.</li>
<li>Hide custom options pages from these users (if your theme/plugin has a custom settings page you wish to hide).</li>
<li>Hide any other menus or submenus. Simply select which menus you wish to hide.</li>
<li>Hide admin bar menus and elements. Choose which elements you wish to hide.</li>
</ul>

Editor Menu and Widget Access

Ideal

Allow and control Editor and Shop Manager access to the menus, widgets and appearance menu, plus other menus and adminbar items.

Floating Widgets vs Editor Menu and Widget Access