MatÃas Gagliano
Allow users to crop images within an area (fully responsive). Supports dragging (touch support), zoom and rotation.
Tobias Lindig
Calculate the position of an element relative to another element or event. It has also functionality to handle collision within the viewport of a given container. It does not manipulate CSS or DOM, it only calculates values. It is a basic technology to support implementation of tooltips, popups, popovers, scrollspies, sticky navi and many more.