Web site: www.youngpup.net/2001/domdrag/
License: Free to use
DOM-Drag is an extremely lightweight (4Kb) library that makes DOM elements draggable. It includes support for making part of the element the dragging handle and for limiting the area to which the draggable element can be dragged. It doesn't support drop targets or ghosting, as is the case with scriptaculous (see Chapter 8, "Libraries Used in Part II: Sarissa, Scriptaculous"), but it is much smaller.