Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
Cadence is a distributed, scalable, durable, and highly available orchestration engine to execute asynchronous long-running business logic in a scalable and resilient way.
Titanoboa makes complex integrations and workflows easy. It is a workflow orchestration platform for JVM - distributed, highly scalable and fault tolerant.
ServiceAnt is a service bus which could run on in-progress or distributed environment, it support pub/sub and request/response mode to call other services,It also support persist message and based BASE to keep eventual consistency when running on distributed environment.
Azure Functions Bus is a simple framework that creates a message bus on top of the Azure Functions infrastructure. That way you can create a distributed system using a serverless technology on top of the Azure Storage.