Chopping fresh cranberries
If you don't mind losing some of the juice, try breaking them before cutting them.  Use a potato masher or meat tenderizer or something like that to break them into pieces.  That way they won't roll around when you're trying to cut them up.  Once they are in pieces, you can lay them out on a cutting board and chop away.  You can also put several on a cutting board and mash them down with another cutting board on top.  That will make them less spherical.