RAJA is a collection of C++ software abstractions, being developed at Lawrence Livermore National Laboratory (LLNL), that enable architecture portability for HPC applications. The overarching goals of RAJA are to:

• Make existing applications portable with minimal disruption
• Provide a model for new applications so that they are portable from inception

RAJA targets portable, parallel loop execution by providing building blocks that extend the generally-accepted parallel for idiom.

Additional information can be found at RAJA User Guide.