AWS Lambda is a compute service that runs your code in response to events and automatically manages the compute resources for you, making it easy to build applications that respond quickly to new information.
Amazon CloudFront is a content delivery web service. It integrates with other Amazon Web Services products to give developers and businesses an easy way to distribute content to end users with low latency, high data transfer speeds, and no minimum usage commitments.
Amazon Polly is a service that turns text into lifelike speech, that uses advanced deep learning technologies to synthesize speech that sounds like a human voice. Supports voices for a variety of languages and accents.
Amazon Simple Notification Service is a flexible, and fast messaging service which is fully managed. SNS is a simple and cost-effective method to message both distributed services and human recipients.