Avatar Nine Flat is a great base to build a Joomla website on a responsive grid. Cause of this is the Joomavatar's Avatar Framework, which works in desktops or mobile devices and comes with a flexible layout with 56 module positions, combined with 6 module styles. Furthermore, 7 preset styles and 8 backgrounds are available for your choice. K2 will be support. The used image slider display all images in widescreen show. The download of Avatar Nine Flat is free. You can use it in Joomla 3.x.

AS Templates 002058 is best suitable for Joomla business websites. You can use it for every device, the in-build Bootstrap Framework makes this possible. ASTemplates provide it in a free version with 16 module positions, 10 standard web safe fonts and 30 + Google Web Fonts. The template package includes also the AS Art Slider and the AS Responsive Menu, two useful Joomla extensions of AS Templates. You can display your location by the integrated Google Map plugin and integrate AcyMailing to inform your user about your offers by a newsletter or e-mail. The template is also available in a commercial version with much more features. You can use it with Joomla 3.x.

Triplex3r by a4joomla based on 12 column grids powered by Bootstrap and comes with 7 module positions and a special module position for a image slideshow integration. Its layout adapt also automatically to mobile devices. Triplex3r is ready for Joomla 3.x. The download is free. A pro version is with more features also available.