Free WordPress Social Subscribers Counter pluginFree
This plugin allow you to display your Twitter followers, Facebook fans, and Feedburner readers in your website with a widget and also in the “Right Now” Panel of Admin Dashboard.
You just have to fill three fields. If you don’t want to display a count, just let it blank. But, if your field is misconfigured, it will display an error.
Translation: English, French
Source from: WordPress.org