RokBooser may helps you to speed up your website. This free Joomla optimation extension combines your CSS and Javascript files. RokBooster is also able to convert images or background by Gzip. So the http requests of your website will be reduced. You can download RookBooster on developers website. Its native to Joomla 2.5 and Joomla 3.0.

RT Acacia will be delivered with unique HTML5 canvas charts. Its responsive layout is powered by RokSprocket and supports mobile touch events. RocketTheme equipped it with 8 preset styles, 88 module positions and 8 styled structural module suffixes. The integrated RokBooster plugin speed up your website by CSS and Javascript compression. RT Acacia is native to Joomla 2.5 and Joomla 3.1. The download is commercial. You can use it best for business- or corporate websites.

JVGTheme provide Simple 5 for free, under GNU/GPL license. Its powered by Themexpert's Expose Framework and comes with 65 module positions. Simple5 supports image slideshows and will be delivered with a effectful drop dwon menu. You can use it with Joomla 2.5 and Joomla 3.x.