Duolingo-style Site for Writing?

[Gnorian]

I was wondering if there were sites like duolingo for other purposes.

My main interest is whether there is one for creative writing. Something like Duolingo would be great for encouraging activities like that.

[sakasiru]

This sounds interesting, but I can't picture how to use this system for creative writing. It may be able to give you random words to write a story about for example, but how can a program give you feedback on that?

[Gnorian]

Was thinking more of a system where you get a streak built up for each day you write to a designated number of words. Something that tracks progress with writing and editing with your current manuscript.

[Salxandra]

You might want to check out http://lang-8.com/

[Gnorian]

Will take a look, thanks.