I don't want to download a sieve from a russian forum. Hover Zoom+ is working fine. Source: almost 2 years ago

Hover Zoom+: https://github.com/extesy/hoverzoom/ (this is the open source one, not the old one with malware). Source: almost 2 years ago

It works in places that Imagus had stopped working. He also has a Github page for it: https://github.com/extesy/hoverzoom/. Source: about 2 years ago

It's working good for me. I know there are a few hoverzoom extensions that make it confusing: This is the one I'm using. Source: over 2 years ago

It's 10m per pixel. If you need better resolution you have to buy images from Maxar, Airbus or Planet. A good reseller is https://imagehunter.apollomapping.com/ They are also interested in smaller customers and have a really good service. Source: about 1 year ago

For smaller Areas it's easier to use a reseller. I really like https://imagehunter.apollomapping.com/ Really good customer support. Source: over 1 year ago

I really like to work with https://imagehunter.apollomapping.com/ They have different providers available. Source: over 1 year ago

I know you said you want a free platform, but if you are able to pay, two sources I would check are Planet, which sounds like it might be ideal for you except that it doesn't go very far back in time, and Apollo, which is a multi-source reseller with a good browse tool. If neither of them has what you want, it probably doesn't exist or can't be bought. Source: over 1 year ago

And if you don't mind spending some money, make sure to check out this tool: https://imagehunter.apollomapping.com/. Source: almost 2 years ago