YubiKey - The YubiKey is a one-time password device for secure login with two-factor authentication
Coinbase - Bitcoin, safe and easy.
Nitrokey - Email Encryption. Encrypt your emails with GnuPG, OpenPGP, S/MIME or your favourite email client.
Binance - Cryptocurrencies exchange platform
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
Poloniex - US-based cryptocurrency exchange with maximum security