Checkthis allows users to creat something called a "social poster" to share their big ideas through Facebook and Twitter. The great thing about Checkthis is that you can get real time updates of how other users are interacting with your content.
The service makes it eays to create these posters with a simple to use editor. You can add all sorts of media to the project from polls to pictures, even including a PayPal link. This makes it easy to complete money transactions if you are selling an item or raising money for a cause.