Hamachi - Hamachi is a VPN service scaled to the unique needs of business owners.
Digicert - Encryption & Authentication
ZeroTier - Extremely simple P2P Encrypted VPN
Let's Encrypt - Let’s Encrypt is a free, automated, and open certificate authority brought to you by the Internet Security Research Group (ISRG).
OpenVPN - OpenVPN - The Open Source VPN
SSL For Free - Free SSL Certificate issued in less than a minute.