The Notify module has been ported, but it deliberately only handles a few basic common use cases. I'm wondering if other people have run into the need for more complex solutions, and/or have thoughts about what would be best to try to migrate.

There's Subscriptions, Notifications ( - the editor here is not letting me create links), Message Stack (, several others - a comparison of features is at

From the numbers given there, Message Stack is the most well established. On the other hand, Subscriptions is just one module and does much of what I need to do.