Version 2 of the GridGain open-source Java grid framework includes monitoring, intermediate checkpoints, a fully dynamic MapReduce implementation, Data Partitioning & Affinity Load Balancing and more. More details on The Server Side and InfoQ.

GridGain Systems announced the availability of GridGain 1.5 for download. Gridgain is "an enterprise open source grid computing platform for Java" released under the LGPL. It is available for Windows, Linux and Mac OS X systems, and is developed in java 5. A screencast is available illustrating the development with GridGain of a distributed application.