Not a full window manager, but I've used Winsplit Revolution for years to manually re-tile my windows. I have it set to use ctrl+alt and then the grid of keys:

Not a full window manager, but I've used Winsplit Revolution for years to manually re-tile my windows. I have it set to use ctrl+alt and then the grid of keys: qwe asd zxc ...to move windows into corners, sides, or the center of the screen. Hitting the same key over and over re-sizes it to take up more or less of the screen. It's sadly no longer being developed, but works fine on Win8 and Win10 (and so probably will continue to work into the foreseeable future).