I'm not sure of the others, but it should work fine in OpenVPN. The configuration for it documented, if a little bit of work to get going. I've been using it for many years, having switched from Hamachi back in 2007 or so.
The problem I've always had with OpenVPN is that it seems to break down when you are behind the router running the OpenVPN server. I can get an 10.0.0.1 IP on the WAN but not on the LAN. I've asked this question in the OpenVPN forum, but never got a response so I am still using Hamachi. Still looking...
Have looked at it but configuration behind NAT router is a bear. Guess there is a reason LogMeIn bought Hamachi. Not trivial to authenticate and tunnel behind NAT.
