Text widget with raw PHP support and conditional visibility settings. Flexible conditional options with ability to edit and add custom conditions.
Install like any other basic plugin:
Copy the advanced-text-widget folder to your /wp-content/plugins/ folder
Activate the Advanced Text Widget on your plugin-page.
Drag the Advanced Text Widget to your sidebar and add your own content including php code if needed. Optionally specify whether to display only on home, pages, posts, posts in category (-ies) or category archives. Specify even more if you like with slug/ID/title.
The plugins settings are located under Settings => ATW Plugin. From there you can edit/add visibility conditions as well as opt-out from applying conditions to all widgets.