Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I can't find how to create a new proposal.
So how to
To learn about how this works, start by reading the FAQ — http://area51.stackexchange.com/faq
Then go to the home page — http://area51.stackexchange.com
Pick a category to the left, then scroll to the bottom of the page and click 'propose a new site'.