brockangelo

Creating charts has never been easier. Heck, you’d almost call it fun.
This plugin allows the user to create and insert a Google Chart in just a few short clicks. Check out the <a href="http://brockangelo.com/wordpress/plugins/google-chart-generator/" rel="nofollow ugc">working online demo</a> to see for yourself.

Google Chart Generator

Allows the user to create and insert a Google Chart.

Dekisugi

This “Insert Footnote” plugin add any text or HTML code at the bottom of all post contents. If you are tired of text-insertion plugins that is just too bulky and complicated, this simple and light plugin is ideal for you. Javascripts such as adsense codes can also be added.
The nice thing about this plugin is you don’t get extra blank lines above and below your custom footnote, therefore looks nicer on your posts. Visit <a href="http://dev.coziplace.com/free-wordpress-plugins/insert-footnote" rel="nofollow ugc">Official</a> page.

Insert Footnote

This plugin add custom texts/HTMLs/scripts below all post contents. This plugin is so light.

Google Chart Generator vs Insert Footnote