Header and Footer Scripts plugin allows you to add scripts to WordPress site's and just before closing tag.
Plugin directory
head plugins
WordPress plugins for head. Launch any one in a live sandbox in seconds.
Easy add site-wide, category and article specific custom code before the closing </head> and </body>, or after opening…
Simple and easy to use wordpress plugin to add the meta description tag in html head
Move your scripts to the footer to help speed up perceived page load times and improve user experience.