WP jQuery qTip is a plugin that uses qTip v1.0 to display nice looking, user friendly tooltips. Colors and position are easily changeable.
Q. Why qTip 1.0? Hasn't it been superseeded by qTip2?
I needed to have the original JR qTip for WordPress plugin run on WordPress 3.x for an upgraded site. As the plugin hadn't been upgraded in over 2 years and I saw no immediate replacement, I went ahead and upgraded the plugin to work on the latest (3.5) WordPress.