[gizmogwai]

I don't know... Jenkins?

I mean, it is battle tested, has all the features you mention, plus pipeline of tasks, is extensible, can be clustered if needed, and, as a bonus, can serve as a CI as well.

The only downside I see could be the memory footprint, or the fact that you might despise Java.

[nimdraug]

Mm, was always thinking that Jenkins is a perfect tool for build automation, deploy or CI. And it really looks like overkill for our problem. We don't need pipelines, only single tasks like data aggregation, sending notifications, transferring data. So I tried to make a really simple solution. But thanks for mentioning Jenkinks, never thought about it that way