4. Apache Hadoop
Hadoop breaks new ground by enabling businesses to deploy clusters of commodity servers to crunch through many terabytes of unstructured data -- simply to discover interesting patterns to explore, rather than to start with formal business intelligence objectives. Tools like Apache Hive and Apache Pig have made exploiting Hadoop easier for developers, and the evolution of the Hadoop ecosystem points to further ease and deeper insights in the years to come.
As Hadoop solutions proliferate, businesses will better be able to predict the behavior of Web customers, optimize workflows, and discover patterns in everything from medical histories to common search terms. The best thing about the new wave of Hadoop analytics is that we're only beginning to discover where it may lead.