Apache CouchDB is an open-source database that stores JSON and runs in resource constrained environments. It's killer feature is that the data it holds can be shared across multiple users and devices in near realtime. Did I mention that CouchDB is also a web server?

Mobile Couchbase is a package of Apache CouchDB designed for iOS. It is pre-Beta right now, but we are taking the wraps off the source because we've had an application that uses it approved by Apple for sale in the App Store. We are soliciting open source contributions and feedback from users.