The best replacement for openvpn is pptp.

The best alternatives to openvpn are rated as following:
★★★★★  pptp
★★★  hamachi
★★★  ipsec
★★★  openswan
★★★  l2tp
★★  ssh
★★  pptp speed
★  windows vpn
★  openvpn-as
★  ssh tunnel
★  private tunnel
★  strongswan
★  chameleon
★  hotspot shield
  microsoft vpn
  sstp
  access server
  ipsec pfsense
  vpnc
  viscosity
  softether
  l2tp\/ipsec
  pptp hidemyass
  openssh
  openvpn as
  freeswan
  ssh forwarding

Your alternative for openvpn is not listed? Suggest!
Speaking about openvpn, one probably shouldn't forget about dd-wrt.

Other search terms related to openvpn and their ratings are:
★★★★★ dd-wrt
★★★★ google authenticator
★★ tomato
★ private internet access
shorewall
You have in mind a companion for openvpn and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of openvpn in all years. Click on graph for more.
openvpn
pptp
hamachi