1. Amazon Mechanical Turk. https://www.mturk.com/. Amazon Mechanical Turk. https://www.mturk.com/.
2. Apache Cassandra. https://cassandra.apache.org. Apache Cassandra. https://cassandra.apache.org.
3. MongoDB. https://www.mongodb.com/. MongoDB. https://www.mongodb.com/.
4. RabbitMQ. https://www.rabbitmq.com/. RabbitMQ. https://www.rabbitmq.com/.
5. Marissa Mayer at Web 2.0. http://glinden.blogspot.com/2006/11/marissa-mayer-at-web-20.html 2006. Marissa Mayer at Web 2.0. http://glinden.blogspot.com/2006/11/marissa-mayer-at-web-20.html 2006.