[mywittyname]

Do any of them work on desktops? I keep around a spare iPad to run my authentication apps, but I'd rather have it installed on my computer instead.

[4d66ba06]

Authy does but has some issues showing same site names as on PC so not perfect

[culturestate]

1Password has built-in TOTP support, though it's a little overkill if you only use it for that purpose.

[Nition]

On Windows there's WinAuth: https://github.com/winauth/winauth

It doesn't seem to be updated anymore, but it works well.