JoomSEF 3 is a component improving Joomla 1.5.x SEO (search engine optimization): rewrites Joomla URLs to be search engine friendly (SEF), helps to manage site meta tags, ...
Version 3.x is compatible with Joomla 1.5.x. It is not backward compatible with Joomla 1.0.x.
Note: free version adds backlink to the component authors to a site footer. To get version without link and support further development, please purchase a paid version.