Joomla is a free and open source content management system (CMS) for publishing content on the World Wide Web and intranets and a model–view–controller Web application framework that can also be used independently. Joomla is written in PHP, uses object-oriented programming techniques and software design patterns, stores data in a MySQL database, and includes features such as page caching, RSS feeds, printable versions of pages, news flashes, blogs, polls, search, and support for language internationalization. Extensions are an essential and very useful part of Joomla. You can do so many things with these extensions, but the most popular extensions are the photo gallery extensions. These Joomla extensions helps you to add amazing photo galleries to your websites. In this post I collected some really cool and Best Joomla Photo Gallery Extensions for Joomla developers.