It's the JFBCSocialShare module that comes with JFBConnect. You can configure it to "Float" in any location on your page. On our site, we have it configured with the following parameters:
Layout: Button Count
Orientation: Horizontal
Position: Float
Margin: 5px
Padding: 5px 0 0 5px
Background: #fff
Float from Top: 3000 (this puts it at the bottom of the screen)
Float from left: 3000 (this puts in on the right side)
In the Facebook section, we have:
Show Like: Yes
Width: 85
Height: 20
I hope that helps get you started, but if you have any questions or run into issues, just let me know!
Thanks,
Alex