It also expands GNOME's 2 column tiling design and adds more features, like:
* Tiling Popup: This is the popup, which shows up when a window is tiled and
there is an (unambiguous) free screen rectangle. It lists all open windows
on the current workspace. Activating one of the popup's icons will tile the
window to fill the remaining screen space.
* Tile Groups: Tiled windows are considered in a group, if they don't overlap
each other and aren't interrupted by non-tiled windows. If one of the
windows is focused, the rest of the group will be raised to the foreground
as well. A Tile Group also resizes together.
* Layouts: A layout is a list of arbitrary rectangles. When activating one
with its keybinding the Tiling Popup asks you which of the open windows you
want at which spot of your layout. The layout selector is a popup, which
will lists all defined layouts by name. This way you don't have to remember
the layouts' keybindings.
* Pie Menu: Super + RMB on a window will open a simple pie menu.
