3个openvpn客户端软件(第三方版本）

http://switch.dl.sourceforge.net/project/oast/oast/OAST%202.4/oast-2.4-portable.exe
http://sourceforge.net/projects/oast/

http://ignum.dl.sourceforge.net/project/securepoint/SecurepointSSLVPN_%20v1.exe
http://sourceforge.net/projects/securepoint/
官网-www.securepoint.de

测试可用，且均无需用管理员权限运行。
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OpenVPN便携版下载地址： http://sourceforge.net/projects/ovpnp/