[rsync]

You're forgetting craigslist.

Year after year, same old "ugly" site, same old boring use case.

I wish I'd thought of it.

[themagician]

I forgot a few things. CL is definitely one of them.

Another thing I left out, which I feel is novel, is the wiki. IMO the wiki is one of the few "new" things. When you really think about the wiki it's pretty different form a message board or co-editing a website. It's something else.