Tile - Track your lost items
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Tile Sticker - The small Bluetooth tracker that sticks to anything
andOTP - andOTP is a two-factor authentication App for Android 4.4+
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.
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.