Memo is a great Tumblr theme for WordPress. It features simple, minimalist design so it puts your content into focus. The theme supports 8 different post formats so you can share varied content: standard, image, gallery, audio, video, aside, quote and link.
The theme allows you to choose your own accent color and generate shortcodes (buttons, tabs, alerts, columns). It includes 3 custom widgets, for Flickr, Twitter and videos, as well as handy page templates for archives and contact form. This is a perfect theme for those who love microblogging.