I've been hoping the Hub would be released for other devices but after reading the reviews I'm not sure it works in the same way as it did on the BB10 devices by calling the other apps. I will give it a go though.
Since transferring over to Android I've been using an app called Disa which is along the similar lines of the Hub but only covers SMS, WhatsApp and FB currently. It deals with sending messages itself though without the need of opening up external apps. If it did email as well it would be perfect.