Disco - Massive data, Minimal code
Disco is an implementation of the Map-Reduce framework for distributed computing. As the original framework, which was publicized by Google, Disco supports parallel computations over large data sets on unreliable cluster of computers. This makes it a perfect tool for analyzing and processing large datasets without having to bother about difficult technical questions related to distributed computing, such as communication protocols, load balancing, locking, job scheduling or fault tolerance, which are taken care by Disco.
See discoproject.org for more information.