Alexandru Vornicescu

This is a WordPress plugin that will add a fullscreen button functionality to your Text Widget editor.
After you press the fullscreen button the editor will take all free space of your screen.
Now you can view and inspect your text easier.

Text Widget Fullscreen

This is a WordPress plugin that will add a fullscreen button inside your Text Widget.

CodeAndReload

This plugin provides the option to enable/disable the usage of shortcodes in the default text widget provided by WordPress along with smilies if enabled for the blog.
<h3>Support</h3>
Technical support for this plugin will be provided via the WordPress plugin forum. Additional support may be 
available at <a href="http://www.codeandreload.com/wp-plugins/allow-shortcodes-in-text-widgets/" title="Allow Shortcodes in Text Widgets at Code
and Reload">plugin’s homepage</a>.

Allow Shortcodes in Text Widgets

This plugin provides the option to enable/disable the shortcodes in the default text widgets along with smilies.

Text Widget Fullscreen vs Allow Shortcodes in Text Widgets