Non google-playstore based community android-app rating website

Is there any comunity based android-app rating web site where the app-popularity is not based on google-playstore? The sites i found so far either indirectly uses google-playstore-ranking or some technical writer tells you "wich are the best XXX apps for YYY". I am interested in community based ranking where even apps that are not available in google-playstore can be ranked. I am thinking of something similar to *.stackexchange where registered user can either * up and downvote apps * or give an app a quality value (i.e. 1-5 stars)