Messaging

SQS

Simple Queue Service allows producers to send message to a queue and listeners to consume those messages. Oldest AWS offering. SQS is a FIFO queue, so the messages are processed in order they are sent.

Kinesis

Real-time big data streaming.

SNS

SNS allows you to send messages to a topic which can then have multiple receivers that perform different actions based off that.

Amazon MQ

Fully managed message broker service for RabbitMQ and ActiveMQ. Used for migrating to the cloud to work with existing on-prem infrastructure. Doesn't scale as much as SQS and SNS.