ReDJ is a native extension (component + plugin) available for Joomla that allow to manage URL redirections. This is very useful for creating URL aliases, and managing redirections from an old URL to a new one. A very similar extension has been added into Joomla since 1.6 version (Redirect component), but ReDJ supports powerful regular expressions that allow to match more than one source URL. In this way it is possible to create a group of redirections with just one ReDJ item. It's so easy.

Also, now ReDJ comes with support for macros into destination URL. This means that from now the destination URL can be dynamic.

Finally, an "internal redirect" feature has been added (Enterprise version only). With these features now is possible to create "real" URL alias with Joomla.

There are two versions of ReDJ, Community and Enterprise, both released under GPL license. The Community version is completely free, while the Enterprise version has a little subscription fee, but introduces some advanced features. Here's a comparison matrix between Community version and Enterprise version:

Features	ReDJ Community	ReDJ Enterprise
Intercept and redirect any error 404 URL
Support for 301 (Moved Permanently)
Support for 307 (Temporary Redirect)
Support for 200 (Internal Redirect)
Use of regular expressions to specify matching source URLs
Case-sensitive option on the matching source URLs
Request only option to match the full URL or just the REQUEST_URI part
Decode URL option to decode URLs before to check if match with rule
Support for skip rule condition
Support for skip usergroup condition
Support for placeholders
Option to apply a rule only in case of error
Possibility to add a note for each item
Use of macros to specify destination URL (dynamic destination URLs)	(42 macros)	(54 macros)
Custom error page
Use of macros to customize error page	(6 macros)	(6 macros)
Trace redirections with hits counter and info about last visit
Trace custom error page with hits counter and info about last visit
Trace errors with hits counter and info about last referer and time
Trace referers for each visited URL with hits counter and info about last visit
Configurable list of referers to exclude from trace with macro support	(2 macros)	(2 macros)
Option to redirect any error 404 URL to a custom page
Option to shortcut extensions directly on the error page
Option to set a global base path (easy items portability)
License	GPL 2.0	GPL 2.0
Price	Free	9 €