Alexander Rauscha

gMapTip is a Google Maps Plug-in. With gMapTip you can easily add Tooltips to your post to let everyone know where he/she can find shops, restaurants, etz. in his/her environment or just show everyone where something in this world is located. 
For more information visit: http://www.gnomx.at/gmaptip

gMapTip

Add Google Maps Tooltips to your Posts & Pages.

Haris Zulfiqar

WordPress tooltip plugins lets you add tooltips to plain text and links on your post and pages.
It offers a tinyMCE shortcode GUI which will guide you through the entire process of a tooltip.
This plugin uses jQuery tipTip authored by Drew Wilson http://code.drewwilson.com/entry/tiptip-jquery-plugin.
You can also add tooltips manually by following the pattern below:
<pre><code>[tooltip content="This will show in a tooltip" url="This will make tooltip a link"]Hover over me for tooltip[/tooltip]
</code></pre>
Url is optional. If URL is added, it will render a link otherwise it will be a plain text.

WordPress Tooltip

WordPress tooltip lets you add tooltips to content on your posts and pages.

gMapTip vs WordPress Tooltip