kegentile

This is plugin uses a shortcode to add javascript to any page, post or custom post type through the editor. It follows the same conventions as wp_register_script minus in $in_footer parameter.

JavaScript Shortcode

Adds a shortcode to allow you to add javascript on any page, post, or customer post type in the editor

adrian7

WP Image Preloader, pre-loads images using Javascript. It uses an image preloader for jQuery (thanks to Matt Farina, http://www.mattfarina.com/). 
You can use it to preload hover images in your blog posts or in your wordpress themes, in menus slideshows etc. 
Find more about this plugin here: http://adrian.silimon.eu/wp-image-preloader/ .

WP Image Preloader

Preloads images using Javascript. Use it to enhance your blog's visitors experience by preloading images…

JavaScript Shortcode vs WP Image Preloader