Lulu is a fully responsive, minimalist, WordPress theme with 4 custom post types, responsive flex slider, filterable portfolio/gallery, and built-in contact form.
Price: $35
The responsive layout means it automatically adjusts to the visitors screen size making it look great on desktop computers, tablets and smartphones.
Artisan is a portfolio responsive theme for the self-hosted (.org) version of WordPress (read this). Premium themes typically include support and updates. See more Responsive WordPress Themes.
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