OpenVPN Connect for Android

OpenVPN Connect is the official full-featured Android VPN client for the OpenVPN Access Server, Private Tunnel and OpenVPN Community, developed by OpenVPN Technologies, Inc.Features:
* Supports Ice Cream Sandwich, Jelly Bean and higher. Does NOT require a rooted device.
* Easily import .ovpn profiles from SD card, OpenVPN Access Server, Private Tunnel or via a browser link.
* Improved power management – preferences setting allows VPN to pause in a low-power state whenever screen is blanked or network is unavailable.
* Android Keychain integration – OpenVPN profiles may reference a cert/key pair in the Android keychain.
*Supports hardware-backed keystores (such as on the Nexus 7)
*Support for multi-factor authentication using OpenVPN static and dynamic challenge/response protocols.
*Full IPv6 support (at both the tunnel and transport layer)