Enterprises now often use event streaming as the source of truth and as an information-sharing mechanism in microservices architectures. This creates the need to standardize event types and share those standards across the enterprise. Event schema registries are commonly deployed but the existing offerings tend to be specialized to a single broker such as Apache Kafka or Azure Event Hub. They also fall short of conveying rich documentation about event types that goes beyond simple schema definitions. EventCatalog is an open-source project that provides something we often see businesses building for themselves: a widely accessible repository of documentation for events and schemas. These describe the role the events play in the business, where they belong in a business domain model and which services subscribe and publish them. If you're looking for a way to publish event documentation to your organization, this tool might save you the trouble of building it yourself.