The Salsa Commons API is a REST and XML API that, as Salsa explains,
"At it's simplest, using the Salsa API may consist of just a form placed on an external website ... At it's most complex, you could use a Ruby library to authenticate, pull down information on recent supporters and events, validate that data, change it, and submit it back to the node, while generating and displaying counts of petition signers -- all through the API."
As more and more people are using Twitter as a means of sharing and communicating, it seems that almost every web and mobile application on the planet as a "Share this on Twitter" feature. Most of the time, this feature is welcome. Posting Foursquare mayorships, new blog posts, entertaining YouTube video, etc. But sometimes, it's a problem. Namely, when a web application doesn't include the option to not post to Twitter or makes the button hard to find or easy to miss.