ngrok
官网 http://ngrok.com
ngrok1为开源版本，ngrok2闭源 ,并且官方好像并不打算开源，只会开源client端
https://github.com/inconshreveable/ngrok
go语言实现
pagekite
官网: https://pagekite.net/
完全开源
https://github.com/pagekite/PyPagekite
python2 实现
http://www.sitepoint.com/accessing-localhost-from-anywhere/