Shimo is more expensive than the others, but not by much: it is only €14.95 (about $21USD). Finally, my client of choice is Shimo, which is not just an OpenVPN client (like the other two), but also works with a number of other VPN and VPN-like solutions: Cisco VPN, IPSec, PPTP/L2TP, SSH, and so forth. It has a cost of $9USD with a 30 day trial. One popular OpenVPN client for OS X is Tunnelblick. There are a few possible clients to choose from. Here, I look at setting up OpenVPN as a client on OS X. In other tips I've covered how to set up an OpenVPN Linux server and an OpenVPN Linux client.
