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

fsquared

The F2 Tumblr Widget displays recent posts from the provided tumblr blog.
It allows the user to select how many posts to display, to restrict which 
posts are shown by type and tag, and to render the posts as either a list 
or a slideshow.
Posts can be displayed in full, as title only, or with an excerpt. Photo, 
video and audio posts will have the media displayed when the display type 
is not ‘title only’.
The audio player in posts can now be automatically resized to match the 
selected media width – this is enabled by default, but can be deselected 
in the widget setup.

F2 Tumblr Widget

This widget displays recent posts from a tumblr blog.

Tumble vs F2 Tumblr Widget