speq

I think Nim is the frontrunner here. Close to Python to write because it is so expressive, close to C speed because it is compiled properly.

Unexpected Keyboard is good for quick typing:

https://f-droid.org/packages/juloo.keyboard2

Depending on your definition of "free" you could use Keet: https://keet.io/

There's also URLCheck:

https://f-droid.org/packages/com.trianguloy.urlchecker

https://www.archivebuttons.com/ is the way

Also: https://standardebooks.org/

Thank you very much! Unfortunately after confirming the information in the signup dialog, it says "Please wait" and hangs. Is it me?

Edit: It works on the second try on the computer, thanks again

No, that's Mull. Mullvad is maintained.

What shady background?

There's also KID3 and Foobar2000.

Spamgourmet