Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Tile - Track your lost items
andOTP - andOTP is a two-factor authentication App for Android 4.4+
Tile Sticker - The small Bluetooth tracker that sticks to anything
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.
Clap To Find My Phone - Clap To Find My Phone is a free-to-use app through which you can precisely discover your cell phones and tablets just by clapping.