iJoomla.com, the leading commercial developer for Joomla, has released a new version of the popular iJoomla MetaTag generator. Version 1.0.3 incorporates a number of fixes and works with Joomla 1.0.13. It's also released under GPL license so the Joomla community is welcome to make changes and improvements.
 

iJoomla MetaTag Generator lets publishers enhance their search engine optimization easily. Instead of entering keywords manually for each page, you can edit up to 50 pages of meta keywords simultaneously, create descriptions automatically, and generate keywords based on your content within seconds. You can even edit or generate keywords and descriptions for the popular MosestsTree component.

It's the fastest way to improve your Joomla site's pagerank.
 
Read more about it here, see a demo here, download it here.