From Aardvark Digital:
Periodic Table Explorer application contains all the elements of the Periodic Table along with images of the elements in their natural state, as well as lots of other information and interactive displays. The Periodic Table Explore has a completely new and innovative user interface that allows for an almost unlimited amount of control over the display. Each display can be opened any number of times and can show different information. The size, shape, and position of each display can be customized. Features include detailed information on each element, details of isotopes and allotropes, details of important compounds, details of reactions with water, air, halogens, and acids, images for each element (300+ images in total), including valence and crystal stucture diagrams, glossary of terms, graphs of important element properties, biographies for the important scientists and element discoverers, view the states of the elements at any temperature (from 0 - 6000k), search through all content, electron shell diagrams of each element (including orbitals), and atomic width diagram.