Oh man, not case sensitive, NOOOOOO!!N

I’m busted I guess. Beep boop.

Well that was the quickest random result I had while searching on mobile. Just to pave the way at least :)

That image seems to be on stock image sites like this one. So it’s just an image. Didn’t see any version that is converted to an actual theme.

Well, those windows reminded me of this old VLC skin.

And no, not a bot. Just a random internet user.

Looks like the design of LCARS (Star trek).

So you may like this theme or similar to this one.

Binaryeye supports both decoding and encoding via Share menu. So you can share an image from any app to decode(can also be a photo that has a qr code somewhere). It also supports sharing a text or link to generate one. It also has searchable history support.

Of course Github is just an example but you can pretty much regex any URL and further filter out anything in order to get the apk link with it. So depending on your level of privacy requirement and trusted sources, you can skip all the centralized ones and build your own list of sources.

Not exactly answering your question but you can use the app Obtainium to fetch the apk URL from a website/github repo and many other sources to install directly. It also supports fdroid repos and many other sources out of the box. Kinda half way what you mentioned in your first paragraph.

In addition to the answer #4, you can use Geo Share to automatically convert google maps links then open in OsmAnd for example.