Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
mancala, also called wari(oware) can be played at kurnik.org live, so you can test it, also at ludoteka.com (no ratings). afaik it is also played at mind olympic games in Czech Republic