MapR Sandbox for Hadoop is a Spark distribution from MapR.
The MapR Sandbox for Hadoop is a fully-functional single-node cluster that gently introduces business analysts, current and aspiring Hadoop developers, and administrators (database, system, and Hadoop) to the big data promises of Hadoop and its ecosystem. Use the sandbox to experiment with Hadoop technologies using the MapR Control System (MCS) and Hue.
The latest version of MapR Sandbox for Hadoop 5.1 uses Spark 1.5.2 and is completely unsuitable for any Spark development (given how old the Spark version is used in the box).
The documentation is available at http://maprdocs.mapr.com/51/.