Scott Taylor

Your Media Library and Post History are a wealth of information and assets. Tumble allows you to pick items to share on Tumblr with just one click. The plugin is smart enough to know what kind of content you are sending and will make the proper API call to Tumblr. Super easy!
Read more: http://scottctaylor.wordpress.com/2010/11/18/new-plugin-tumble/

Tumble

Tumble is simple-to-use and allows you to manually send Posts, Images, Audio, and Video to Tumblr from within your Dashboard/Media Library

jeffikus

Create a tumblr style blog using this plugin. Simply install the plugin, add the easy to use tags to your theme, and your blog will be transformed into a Tumblr-style blog. Create posts direct from the WordPress dashboard, your iPhone, or the familiar WordPress interface.

WooTumblog

Create a tumblr style blog using this plugin.

Tumble vs WooTumblog