I have found a couple of related questions here on programmers.SE:
My question is slightly different because I am primarily looking for non-coders to help with a few things in my new open source project. In particular, I'd like one or more people to create an icon and other graphics and to work on a web site, wiki pages, and/or other documentation.
My project is a front-end for a baseball card database. So reaching out to baseball card collectors might be useful. Other than that, I would just like anyone who would like to contribute in small ways to a modest project. Where are some good places to advertise and find non-coder volunteers?