Incognit@
Akeeba Backup 
Akeeba Backup Core is the successor to the now famous JoomlaPack component. In a nutshell, Akeeba Backup Core is an open-source backup component for the Joomla! CMS, quite a bit different than its competition. Its mission is simple: create a site backup t ...
joomlaXplorer
joomlaXplorer is a File- and FTP - Manager. It allows you to edit files, delete, copy, rename, archive and unpack files/directories directly on your server. You can - Browse Directories & Files - Edit, Copy, Move and Delete files - Search, Upload and D ...
JCE
An award-winning, configurable WYSIWYG editor for Joomla! based on Moxiecode's TinyMCE. Includes advanced Image/Media, File and Link handling, plugin support, and an Administration interface for editor configuration.
All Weblinks
The ALL_WEBLINKS extension is made to fix some short comings in the default Joomla! component. With this extension you can show links in various layouts, Show all categories in one page, or specify which ones to show, display if a link is new, show the ...
Blogg-X
UPDATE (13 June 2010) - Added German and Russian language support. UPDATE: 3.0 Beta Released (Joomla! 1.5 Support) Blogg-X is a cross platform (OS X, Windows XP, Linux) content management tool for websites based on the Joomla! CMS. Blogg-X runs locally ...
JoomSEF Free
SEO component to make your Joomla! URLs SEF (search engine friendly) and easily human understandable with metadata and sitemap generation capabilities. *** JoomSEF 4 STABLE for Joomla 1.6 is available now! *** Supports URL translations at multilingual sit ...