Originally titled Portfolio Theme, Portfolio Press is a free blogging theme from WordPress Theming which is programmed in HTML 5.
The theme uses custom post types for the included gallery. This portfolio section works really well however in my opinion the theme feels more like a blogging theme than a regular portfolio theme.
The portfolio (gallery) page works really well. When a user scrolls over the image the name of the image/article is displayed. Clicking on the image will take the user to the article in question (or post with enlarged image).
In the video below the theme developer Devin shows you how Portfolio Press works and how easy it is customise menus and add images.
More information about the theme (including common questions) can be found at the link below.
Download & Info: Portfolio Press WordPress Theme