Requirements: WordPress 3.3 or higher.
Theme: Grido by Themify:
Grido is a new Tumblr-like theme to join the responsive theme family (Tisa, Suco, Elemin, Funki, Minblr, Wumblr, and iTheme2). It is colorful, trendy, and stylish. The theme comes with 9 gradient backgrounds for you to style the post individually. You can choose a color scheme to reflect the mood of the post or select a different color for each post to make your blog look like a wall of sticky notes. The posts are automatically stacked on top of each other. View the demo and resize the browser window to see how the posts re-stacked in animation. If you like Grido, you may also like Wumblr and Elemin.
WP post formats
Responsive layout (view demo and resize your browser window)
Auto stacked layout (post-notes like design)
9 post gradient colors
Lightbox gallery (no plugins required)
Optional RSS, search form, and social network icons
Header and footer custom menu
Footer text and footer logo
List view and multiple grid view layouts
Choose up to 4 footer widget columns
7 theme skins
Coded with HTML5 & CSS3
Child theme support