Try 2FAS. Open-sourced. Also works on Android. Has a browser extension that allows automatic 2FA entry paired with a phone.

OTH, if you need a Windows client, then Authy may be the way to go. Need to religiously copy the TOTP secret (when setting up) and save it somewhere else, though. Because it doesn’t officially allow export, it might be a bitch to move to other authenticators.

What happened to Raivo?

Edit: nvm found it

Let’s see what happens

Protonpass, it’s free, opensource and supports multiple platforms as well.