The Event Grid Binding can be used to receive events from a variety of sources and actions. Provide a reference on the Event Grid Binding page to these sources and associated Dapr components.

Docs: https://learn.microsoft.com/en-us/azure/event-grid/overview
For example, Azure Blob Storage (with Dapr Azure Blob Storage Binding and State Store) is a supported source.
Similarly EventHubs with Dapr PubSub and Binding components
SignalR Binding
Azure App Config (with Dapr Configuration Store)
IOT Hub (served by Dapr EventHubs components above)
Service Bus (PubSub and Bindings)
and others