Shade Loving Ground Cover

Native Alternatives to English Ivy, Japanese Pachysandra and Periwinkle

I have a very shady yard and I spend lots of time looking for low maintenance shade loving ground cover. So this really peaked my interest I like the Canadian wild ginger and already have some growing around several trees in my yard. I am now looking for some additional ground cover that adds color. Over the next three years I hope to eliminate the bare spots under several large oaks using ground cover.