Thomas Schulte

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.
For the tooltip effect a jQuery plugin called “qTip2” is used internally. 
Find more about this great project here: http://qtip2.com/ 
The thumbnails are provided by http://thumbsniper.com and its API.

ThumbSniper

This plugin dynamically shows preview screenshots of hyperlinks as tooltips on your WordPress site.

Jeff Lambert

The WEBphysiology Portfolio plugin was built to provide a clean, current look in situations where an expanded list-style or grid-style portfolio layout is appropriate. The plugin is implemented via a [shortcode] that supports a variety of filtering options based upon Portfolio Type. More than one shortcode can be used on a given page, allowing for grouping portfolio records by type. And the shortcode also supports overriding many overall option settings on a case-by-case basis.
The plugin utilizes a Custom Post Type as well as a Custom Taxonomy. It provides an Options page for specifying some customizable settings, like the number of entries to display per page. It also allows one to turn off the provided CSS in place of implementing your own.
The Portfolio entry screen is customized to include just the items that make up a Portfolio entry. Attributes that aren’t populated will not be displayed on the end user interface as well as custom fields whose display has been turned off. Attaching an image to a Portfolio entry also has been made relatively painless.
To enhance the design, and also reduce page weight, thumbnails of full-size imported images are generated. Or, if you prefer, the ability to add automatic web site thumbnails utilizing ShrinkTheWeb.com or PagePeeker.com can be used.
The end user interface can be adjusted using styling Portfolio Options or via your own CSS. Managing how things work within the end user interface is very customizable. Clicking thumbnail images can result in an image opening in a thickbox or it can take the visitor to the specified website URL…. The plugin also supports video media types, such that they can be played within a thickbox. YouTube and Vimeo URLs will automagically generate thumbnails from the referenced video without the need to provide an image URL.
A good many hours have been poured into this plugin, so, appreciation in the form of a donation always brightens our day.
<h3>Support</h3>
NOTE: SHORTCODE DEPRECATION ALERT: The [portfolio] shortcode was replaced with [webphysiology_portfolio] in version 1.3.0
NOTE: CSS DEPRECATION ALERT: The “portfolios” element ID was be deprecated in version 1.2.7
I will do my best to correct any reported defects as soon as I can make time, but please understand that this is side work. That said, I also use this plugin and am keen to ensure it provides the intended functionality. As to requests for enhancements, feel free to make these. I’ll do my best to respond to your requests and, for those requests that I feel would benefit the majority of users, I’ll get them on the enhancement list. I can’t say just how quickly these would be implemented but funding the request would definitely move it up in the queue.

WEBphysiology Portfolio

Allows for the creation of an expanded-list styled or a grid-styled page containing images and supporting detail, perfect for a portfolio presentation …

ThumbSniper vs WEBphysiology Portfolio