rogerco
JPub
Distribute your Joomla! articles in the electronic publication (ePub) format. Ideal for eBook readers such as the Amazon Kindle, iPad and the various Android-based electronic tablets. Generate simple documents using the current article, or build multi- ...
boxplus
boxplus is an ultimate lightweight pop-up window implementation (commonly known as lightbox) that can show images, video and other multimedia content including Picasa web albums, YouTube and Vimeo videos, Flash, QuickTime, PDF as well as custom HTML conte ...
RSGallery2 
RSGallery2 is a full featured, easy to use, highly customisable, gallery component for Joomla! Users can upload their images via frontend and backend, via single file upload, batch upload or ftp upload. Galleries containing images can have as many (nes ...
File Manager
With this component you get powerful File Management Utility that allows not only manage files and folders but publish them to your site by visitors with Public/Registered/Special access assignment. Allows easily create Picture Gallery, Download Center, ...