Joomla is my favorite Content Management System even though it is years behind WordPress functionality. Of course, WordPress is not a CMS 
So when I decided to build a new site using Joomla 1.5 I have had to find solutions to the following problems:
1. SEO component. Joomla SEO / SEF couldn'tt suck more... From the time of Joomla 1.0.* I know that one of the core Joomla developers had a commercial SEO component. I guess that's why Joomla will never have elementary SEO functions like really friendly URLs. Yes, there are some in-built... but that's just bullsh*t. Of course, there are 2-3 commercial (or let's call them paid for political correctness) plugins which probably work fine.
Anyway, I have made my choice to sh404SEF. Next I have tried a way to get it free of charge. Luckily, I stumbed upon this site offering it for free download As a whole, it works fine even though my Joomla is quite complex. It has Joomfish and many other plugins...