AWS EventBridge
AWS serverless event router. "EventBridge is a serverless service that uses events to connect application components together, making it easier for you to build scalable event-driven applications." Two delivery surfaces: event buses (many-to-many routing) and pipes (point-to-point with optional enrichment/transform). EventBridge Scheduler adds cron/rate scheduling. Includes a Schema Registry that supports JSON Schema and OpenAPI 3 representations of EventBridge events.