Content Locker Pro
This Adobe Muse widget allows you to automatically hide any content to users until they share it on Facebook, Twitter and/or Google
It supports multiple background and text colors, it also let you choose what social buttons you want to include: Facebook like, Twitter share or Google Plus One.
This widget allows you to hide any content placed in a secret container rectangle.
You can customize background color, transparency, text color, and more settings.
You can select to show only some social buttons or all of them.