CodeCanyon - Easy Show & Hide v1.1 for WordPress | 89,3 KB
Easy Show & Hide is an incredibly easy WordPress plugin that allows you to add hidden content to your WordPress posts and pages. Hidden content is then displayed by the user with the click of a button. You can customize the show/hide button text and button styles. This plugin works great for spoiler alerts, extended content, and image galleries!
DEMO:
http://codecanyon.net/item/easy-show-hide-for-wordpress/1630806