For books? I've been writing a book and wanted to get opinions on it by people I don't know.
Most Helpful Girl
goodreads. com is a site for published books, self or company published. If it's unpublished, book and writing forums are probably your best options. You may even be able to talk to some people on goodreads willing to help.2
Most Helpful Guy
Wattpad. com. It's for people who want to submit their work. I write there too. And if you're good or manage to make friends you can end up making a name for yourself.0