Smokeping, statping-ng, Uptime Kuma... you could simply search this sub.
thekrautboy
The general consensus is that its not worth the headache to selfhost email.
Try /r/HomeNetworking or simply /r/TechSupport
Apprise isnt exactly aimed at you as a user, but more at someone who makes their own project.
For example you make a tool that notifies a user about available updates of Docker container images. Users want you to include email notfiications, and Pushover, and Pushbullet, and so many more.
Instead of you manually adding each platform as its own, which takes a long time, you can simply add support for Apprise. And Apprise covers all those platforms already for you.
Not a "live integration" tho, when i tried it some months ago.
There is a demo on https://honeyy.vercel.app/
I quickly looked up midata and it seems like a government "standard" so banks can provide your account data as a uniform downloadable format.
But you are asking for "live integration" which is very different.
Do you think your bank provides a free and open API that can be used by such a tool? Unlikely.
Search for youtube in the awesome-selfhosted list from the sidebar, and simply search youtube in this entire subreddit, easy to find a few things to try.
No i dont. But you can search this sub for it.