so i am not sure celery belongs here  celery is really just using kombu itself  kombu came out was developed side by side of the celery project btw and is the framework on top of it  taskflow is not really a task queue solution either  but the jobboard concept from it can be both celery and taskflow build on those foundational concepts to add things  but they are not the solution them self so probably not worth mentioning them as such here 