PickJoomla provide Pjo Astoria in a free version with fine features, like 4 preset styles, 3 columns, multiple module positions and a header slideshow. You can set your favorite columns by a integrated column switcher. Also a body font size chooser is included. Pjo Astoria works in Joomla 2.5. The download is free. If you want to get this template with more features, PickJoomla provide it also in a commercial version with all available features.

OT Smarthouse is best suitable for furniture- or kitchen websites. OmegaTheme realized it on their OMG Responsive Framework, which is ready for desktops and mobiles. OT Smarthouse comes with K2 and is ready for Joomla shop extensions, like VirtueMart. Its source code is well commented. So its easy to adapt it, as you want. The collapsed menu makes the navigation unique to other templates. The download is commercial. Its native for Joomla 2.5 and will be delivered with HotQuickStart.

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.