Free responsive theme

I am working on a non-profit site. I am comp the website my work, and I am looking for full featured theme that is free responsive.

I would appreciate a few suggestions. The theme doesn’t have to be super gorgeous, but I do need flexibility to work with their content.

A podcast or news type setup should probably work best.

I did research a few hours, but it is so time consuming looking at the choices. There is no way I could ever load and try them.

So, I thought this might be the best way to move on with this.