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.

Pankaj Anupam

Shortcodes in Sidebar plugin allow shortcodes to execute when used in sidebar text widgets. All that is needed is to download, install and activate. This is very useful for placing things like contact forms and other shortcode enabled features in sidebars.

Shortcodes in Sidebar

Upload, Activate - refresh page and shortcode is running, it worked right away. Thanks for that. 

Sweet

Shortcodes in Sidebar allows shortcodes to execute in sidebars.

Voce Post Widgets vs Shortcodes in Sidebar