Tunnelblick

Tunnelblick is a free, open source graphic user interface for OpenVPN on OS X. Use Tunnelblick with VyprVPN to securely connect a Mac running OS X to a remote network or the Internet and bypass untrusted networks, censorship, or eavesdropping. Tunnelblick is written in Cocoa and comes as a ready-to-use application with all necessary binaries and drivers (including OpenVPN, easy-rsa, and tun/tap drivers). No additional installation is necessary, simply add your VyprVPN configuration and encryption information.

Tunnelblick supports multiple connections so you can easily switch between VPNs from your menu bar if necessary.