Volunteer UX projects

Hello,

I am looking for some volunteer UX work, preferably for a great cause. Due to an NDA I am unable to present my current work to prospective employers. So I am looking for some volunteer opportunities: 1. Because UX is so important and it would be awesome to help out on a project with a great cause and 2. I would like to get some work in my portfolio that I can actually show.

Thanks,

LaKeisha