Web-based web-page and JavaScript IDE. Kind of. The idea behind the composer is that you should be able to design your page or widget visually, with a moderate amount of styling, and then be able to apply prefabricated functionality to the elements
Timeline is a DHTML-based AJAXy widget for visualizing time-based events. It is like Google Maps for time-based information. Below is a live example that you can play with. Pan the timeline by dragging it horizontally.