Tunnelblick is a graphical user interface for OpenVPN on the Mac. The great thing: the latest installers come with OpenVPN included. So if you have OpenVPN running as infrastructure and also need to integrate Macs – it's now easier than ever before. And considering the fact that OpenVPN is one of the nicest open source VPN solutions, it's worth taking a look even if you're still considering which VPN solution to go with.