This web part can display the list of reference sites for a web agency with photos and comments.
You can easily add this web part and revealing your references to websites. Simply add documents of type "WebReference" below the page that this WebPart. The fields are the site's name, a description, url and a photo. This uses the WebPart control Radslider of Telerik and requires a proper license. (See http://www.telerik.com/)
A trial version of Telerik is included in the zip to try it.