SFlack

Like & Share My Site (LSMS) is a plugin that will allow you to have social ‘like’ and ‘share’ buttons added to the end of your posts. Currently it can display buttons for Facebook, Twitter, Google+, Tumblr & StumbleUpon.

Like & Share My Site

This plugin allows you to add social 'like' and 'share' buttons to your site and individual pages.

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

Like & Share My Site vs Tumble