What messaging apps you use instead of WhatsApp/Messenger

Signal. I actually do use WA as well (peer pressure) but it’s registered to a separate phone/SIM and I use it almost exclusively through a desktop app

Alternatives to Google services (email, calendar, cloud storage)

I use a small local email provider. If that wasn’t an option I’d probably use mailbox.org.
Calendar and contacts: self-hosted CalDAV/CardDAV application. And since I do have a server, that’s also my cloud.

Social media alternatives that respect privacy

Fediverse is private enough for me.

Browsers

Librewolf

Password managers worth using

Keepassxc

Any other productivity apps you’d recommend me to use

What are productivity apps?