Pictorico is a free WordPress grid-based theme that can turn out to be a great choice if you are looking for a good Portfolio theme. This theme bundles all your portfolio items together without any white space so that they can be represented on your website in an engaging way. Pictorico theme also comes with a responsive design so that your website can be perfectly viewed from any device. With this theme, you can also upload your own custom header image, custom backgrounds etc. Not to mention, this theme comes with unlimited color options. Even though this theme has been built primarily for portfolio websites, you can also use it to build beautiful photography websites as well.