Gridster.js

Gridster is a jQuery plugin that makes building intuitive draggable layouts from elements spanning multiple columns. You can even dynamically add and remove elements from the grid.

More at http://gridster.net/.

License

Distributed under the MIT license.

Whodunit

Gridster is built by Ducksboard.

dustmoo Modifications

Widgets of smaller or equal size to the dragged widget (player) will swap places with the original widget.

This causes tiles to swap left and right as well as up and down.

By default smaller players will shift larger widgets down.

I have added an option to prevent this behavior:

$.gridster({
	shift_larger_widgets_down: false
});

By setting shift_larger_widgets_down to false, smaller widgets will not displace larger ones.