Kevin Langley Jr.

Add widgets on a post by post basis by using a new interface directly on the post edit screen.
Filter to set the post types the Post Widgets plugin should load on post_widget_post_types

Voce Post Widgets

A better interface for managing your widgets.

Jonathan Daggerhart

As of version 2.3, Widget Wrangler requires PHP 5.3 or higher
Widget Wrangler is a plugin for WordPress that gives administrators a clean interface for managing widgets on a page by page basis. On each page, you can control what widgets appear where.
Widget Wrangler provides the following features:
<ul>
<li>Widgets as a post type</li>
<li>PHP in widgets</li>
<li>Custom Widget templates</li>
<li>Control Widget visibility on any page (or post type)</li>
<li>Control Widget visibility globally (Display Logic)</li>
<li>Alter WordPress Sidebar HTML</li>
<li>Shortcodes for Widgets</li>
<li>Compatible with almost any existing WordPress Widget</li>
<li>Hide Widget Titles</li>
<li>Automatic Theme Setup</li>
</ul>
<h4>Widget Wrangler Setup Screencast</h4>
http://www.youtube.com/watch?v=oW2NgtwUuHE

Widget Wrangler

I currently use this plugin on over 100 sites. I have been using Widget Wrangler since 2014 and have found it invaluable. I use it to display specific widgets in a custom order in the sidebar, footer area, and custom featured content areas. WW allows me to customize widgets on a per page basis and create a default list of widgets to display when creating a new post/page. It has tremendously reduced the amount of time it takes to change / edit widgets on a page without touching code. It's an awesome plugin!

-Steven

Great Plugin For Managing Widgets

A plugin for managing the display of widgets on a page by page basis. Using widgets as a post type.

Voce Post Widgets vs Widget Wrangler