With Tunl you can expose services on your localhost to the public via a fast and secure tunnel.
Having a web process running at localhost:3000? Quickly share it publicly with:
$ tunl http localhost:3000
Want to share a directory or some files with a client? Quickly share it publicly with:
$ tunl files ~/Documents/project
Have an MySQL server running behind a firewall? Make it temporarily public with:
$ tunl tcp localhost:3306