by Dmitry Mayorov on WordPress.org
Insert Code Lite lets you add scripts, styles, and other custom code to your website.
Dashboard view of the plugin.
With this plugin you can safely change your theme without worrying to loose the code you’ve added.
Disable sidebar and dashboard widgets with an easy to use interface.
Lets you use raw HTML or any other code in your posts. You can also disable smart quotes and other automatic formatting on a per-post basis.
Simple plugin to add script to header and footer for individual pages & posts