AuthGeek is a TOTP and HOTP authenticator that lives on your PC. Your secrets are stored in a local vault encrypted with Argon2 and nothing is synced to anyone else. Scan a QR code, import from a backup, and get your codes without reaching for your phone.
I got fed up reaching for my phone to type a six digit code into the machine I was already sitting at. The desktop authenticators I looked at either wanted an account, synced my secrets to their cloud, or both. The whole point of the second factor is that it is under my control.
AuthGeek keeps the secrets in a local vault encrypted with Argon2. No account, no sync, no telemetry. Scan a QR code from the screen, or import a backup, and the codes are there. TOTP and HOTP both work.
Worth saying plainly: codes on the same machine you log in from is a weaker setup than a separate phone. If that trade is not right for you, keep using your phone.
Free, source on GitHub. One honest caveat: the installer is not code signed yet, so SmartScreen may warn on first run.