1. Akka. http://akka.io. Akka. http://akka.io.
2. Amazon EC2. http://aws.amazon.com/ec2. Amazon EC2. http://aws.amazon.com/ec2.
3. Apache Hadoop. http://hadoop.apache.org. Apache Hadoop. http://hadoop.apache.org.
4. Apache Hive. http://hive.apache.org. Apache Hive. http://hive.apache.org.
5. Kryo serialization library. https://code.google.com/p/kryo. Kryo serialization library. https://code.google.com/p/kryo.