Cloud computing is big right now, but the sheer number of options, and the lack of interoperability, can be an issue for developers. There are a number of projects that can reduce, or even eliminate, some of these problems by exposing the functionality of a number of cloud service providers through a consistent interface. Here is a list of 7 such projects.
Google continues to push away at improving its platform-as-a-service offering, the Google App Engine API. It has already seen two minor releases this year with the latest release bringing in much needed updates to the XMPP and Task Queue APIs. An earlier release in the year focused on the High Replication Datastore, that was clearly targeted to mission critical applications.