ProxyLocal could proxy your local web-server and make it publicly available over the internet.
This software is splited into client and server parts. Server part is running on proxylocal.com server and usage of its resources is free. Client is written in ruby and distributed as gem, its source code is open and available on github.
ProxyLocal is a tool that runs on the command line.
$ gem install proxylocal
Assume you are running your local web-server on port 3000. To make it publicly available run:
$ proxylocal 3000 Local server on port 3000 is now publicly available via: http://fp9k.t.proxylocal.com/
Now you can open this link in your favorite browser and request will be proxied to your local web-server.
Also you can specify preferred host you want to use, e.g.:
$ proxylocal 3000 --host testhost Local server on port 3000 is now publicly available via: http://testhost.t.proxylocal.com/