OpenVPN Connect is the official full-featured Android VPN client for the OpenVPN Access Server, Private Tunnel VPN 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)
* Uses PolarSSL (not affected by Heartbleed issue)