rapidly develop even more sophisticated solutions for Joomla! including database manipulation like blogs, calendars, shopping carts, surveys, etc., etc.
Adding image galleries inside your Joomla! articles is now super-easy and simple, using the magical "Simple Image Gallery" plugin. It can turn any folder of images located inside your Joomla! website into a grid-style image gallery with cool lightbox previews.
ShowPlus is an eye-catching slideshow for a front-page to display a set of images with user-defined transition between them. It is easy to get started with but offers a number of customization options for more advanced users.
Xmap is a powerful site map generator for Joomla! CMS. Xmap allows you to create a map of your site using the structure of your menus. It not only generates a site map for the users, but also it's able to dynamically generate a XML sitemap to use with Google, Bing and other spiders/robots.
Maximenu CK is a module which can create a multicolumns megamenu for Joomla! with some nice mootools effects. You can organise your menu as you want with the multiple options and optional graphic themes.