ePeterso2

This plugin exports articles from a Joomla 1.5 database and imports them as posts into WordPress. 
It exports the content from a single Joomla category then allows the user to import the content 
into one or more WordPress categories.
This plugin does not convert Joomla articles into WordPress pages, although its framework would 
support such a conversion rather easily if someone would choose to code it.
This plugin does not work on Joomla 1.0 databases. If you need to convert your Joomla 1.0 data, you will first need 
to <a href="http://docs.joomla.org/Migrating_from_1.0.x_to_1.5_Stable" rel="nofollow ugc">migrate to Joomla 1.5</a>.
This plugin does not work on Joomla 1.6 databases. The Joomla 1.5 2-level section/category system has been replaced 
in Joomla 1.6 with a multi-level hierarchical system similar to WordPress. This framework could be adapted to support 
Joomla 1.6 in the future.

Joomla 1.5 Importer

This plugin exports articles from a Joomla 1.5 database and imports them as posts into Wordpress.

misterpah

Before wordpress become what it is today, many of us use mambo and joomla. Then after mambo developer stop the development, we we forced to migrate to joomla and other wordpress. But some of us , we make so many changes to the site, its worth thousands of article; which are a burden to migrate them.
This plugin will do 2 things. By order :
<ul>
<li>Retrieve data from the mambo / joomla database by using pure php. this data will be represented into strings which can be saved as a text-document.</li>
<li>Convert the data retrieved from mambo / joomla into wordpress pages</li>
</ul>
Limitation : * no support for media migration. no image / document / pdf / etc will be transfered into the wordpress site.
in case you want to visit this plugin page on my site, click <a href="http://misterpah.com/scripts/import-mambo-into-wordpress/" title="import mambo joomla into wordpress" rel="nofollow ugc">here</a>

Mambo Importer

Import Joomla and Mambo articles and insert them into wordpress page, regardless of the location of the server.

Joomla 1.5 Importer vs Mambo Importer