Today I came across this story from elegantthemes.com that describes 3 best author box plugins.
Adding an author box to your WordPress posts is a simple yet effective way of increasing the legitimacy and appeal of your blog. Although WordPress lets you add an author’s name and bio to user profiles, some themes provide limited – if any – options for customizing and displaying the author box on posts. How to Create a WordPress Author Box (3 Best Plugins)
thumbnail courtesy of elegantthemes.com