- [P2PVPN](http://www.p2pvpn.org/)
- [QuickTun](http://wiki.qontrol.nl/QuickTun)
- [SocialVPN](https://socialvpn.wordpress.com/)
+- [SoftEther VPN](https://www.softether.org/)
- [strongSwan](https://www.strongswan.org/)
- [VPMN](https://github.com/prodrigestivill/vpmn)
- [VTun](http://vtun.sourceforge.net/)