GoPollGo is all about creating polls, from running them during presidential debates to coworkers polling each other on where to go for lunch. It has two APIs. One is a public read-only API free to anyone. The other is private, in beta that allows third parties to create polls. Clients such as ESPN, Netflix, Hotels.com, Robert Scoble, AppleInsider and The Weather Channel, use GoPollGo to track opinions on their brands and businesses.
Dropbox last week announced that it has added webhooks functionality so that application developers can configure Dropbox to notify their apps whenever their app's registered users perform an action that results in a file change.