@m2m an interesting one for just general world facts / information is The Continent, which is based in Africa.

They even allow you to subscribe through WhatsApp, Signal, Telegram, or email. You can see their website at https://www.thecontinent.org/subscribe for the relevant links.

I do have to thank @axbom for posting about it, which lead me to subscribe.

@shlee +1 for @thunderbird

I use it for my multiple different email addresses (on multiple domains), can configure each one differently, there's a unified inbox, but the message filters are so helpful (I use it to put my newsletters in a folder).

There's also Ferdium (https://ferdium.org/) which puts each as a "service" inside the app, but it just loads the website of the email provider.