Amazon Simple Queue Service (Amazon SQS) is a web service that gives you access to message
queuesthat store messages waiting to be processed. SQS offers a reliable, highly-scalable,
hosted queue for storing messages in transit between computers. SQS is used for
distributed/decoupled applications
Amazon Simple Notification Service (Amazon SNS) is a web service that makes it easy to set
up, operate, and send notifications from the cloud
Amazon Simple Workflow Service (SWF) is a web service that makes it easy to coordinate work
across distributed application components
Amazon Kinesis makes it easy to collect, process, and analyze real-time, streaming data so
you can get timely insights and react quickly to new information