Async API https://docs.mulesoft.com/release-notes/platform/event-driven-api https://www.asyncapi.com/docs/getting-started/event-driven-architectures/ Mulesoft Talk on EDA and Async API
Kafka https://developer.confluent.io/learn-kafka/architecture/get-started/ https://www.conduktor.io/kafka/ https://developer.confluent.io/learn-kafka/event-sourcing/event-driven-vs-state-based/ https://www.confluent.io/events/kafka-summit-americas-2021/event-driven-architectures-done-right/ https://www.confluent.io/events/kafka-summit-apac-2021/apache-kafka-and-api-management-api-gateway-friends-enemies-or-frenemies/ Aiven manager Kafka (with free tier!)
https://www.confluent.io/events/kafka-summit-apac-2021/apache-kafka-and-api-management-api-gateway-friends-enemies-or-frenemies/
AWS - SQS and SNS https://aws.amazon.com/sqs/getting-started/ https://aws.amazon.com/sns/getting-started/ SmoothMQ