MapD GPU Database Open Sourced
MapD Core is an in-memory, column store, SQL relational database designed to run on GPUs (also runs on CPUs). It is now available free - licensed under the Apache License, Version 2.0.
Within a single server, MapD can handle datasets 1.5-3TB in raw size in GPU RAM, or 10-15TB in CPU RAM. In distributed deployments, that number scales linearly.