How can I create Notification Bar for Ghost?

I love Ghost. But I also get very frustrated and angry with it sometimes because some very basic, and I do mean very basic things that you could enable with most platforms like Notification Bars is very expensive to do with Ghost or requires a lot of technical knowledge.

I am trying to create a notification bar for my site. However, I can’t find a cheap way of doing it. All the ones I found is very expensive, almost the like paying for another Ghost license.

If someone has code for one that they don’t mind sharing, I don’t mind making a reasonable donation.

Or if you know where I could get one for free, I would be very grateful. Thank you.