Little Leather Notebook is a free Tumblr theme that features a layout looking like a notebook with a sidebar area on the right. This theme displays all post types beautifully without special attention to any type. This theme also allows you to customize the colors of different elements and build a stunning blog out of it. This theme also supports high-resolution images that help you to use HD images on your blog without making them blurred. Not to mention, this theme is fully responsive and retina ready. You can also integrate your twitter account with this theme and show your latest tweets on your blog to showcase your social presence.