This plugin adds some content to the bottom of every post. That is all. No extra crap.
Create customizable footers for your posts.
This plugin creates a sidebar widget which displays the post/page author's information.
This plugin adds some content to the top of every post. That is all. No extra crap.
Automatically inserts an author bio box below each post. The box contains user's signup date, number of posts, biographical information, gravatar