ProtonVPN - ProtonVPN is a security focused FREE VPN service, developed by CERN and MIT scientists. Use the web anonymously, unblock websites & encrypt your connection.
M for iOS - Email app with automatic encryption
OpenVPN - OpenVPN - The Open Source VPN
i2pd (I2P Daemon) - i2pd (I2P Daemon) is a full-featured C++ implementation of I2P client
TunnelBear - Really simple VPN to browse the web privately & anonymously.
I2P - The I2P network provides strong privacy protections for communication over the Internet.