PairKit lets you temporarily expose any ports, on your local computer, to someone else on the Internet. This makes it great for sharing your local web server with a friend, or letting a buddy ssh into your box to pair with you on some code.
PairKit uses SSH to set up reverse tunnels (one per exposed port) to your computer through a public server (this box).
Setting up exposed ports is rediculously easy. Start sharing ports 22 and 80 with:
$ pairkit share 22 80
PairKit is currently in a closed private beta, but we're sending invites out all the time.
Things are free while we're in beta, but we'll be charging very reasonable rates (which you'll help decide) when we open up to the public.
Get your name on the invite list.