BlogPlaza is a nice blog template for Joomla 2.5 and Joomla 3.1 by Templaza, who realized it on their Plazart Framework. Fonts and colors can be changed easily. The TZ Portfolio support allows you to insert your content fastly. BlogPlaza is commercial. You can download the template package with a lot of bonus pages on developers website

SeoSimple, by Dao By Design and Ryan McLaughlin, generates automatically a meta description tag to any page of your Joomla website. This tag will be generated on page load. This generation will be ignored, if a custom meta description is in use. A fine feature of this plugin are the integrated options for displaying your page titles. Beside this, SeoSimple is free and can be used in Joomla 2.5 or its former versions, Joomla 1.5, 1.6 and 1.7.