Applet-based table with visualizations of the electron shell model, the nucleus, the visual emission spectrum, and energy levels of the electrons. Also has interesting facts about each element represented.
Interactive periodic table with dynamic layouts showing names, electrons, sliders, trend visualization, and instant search. Includes full descriptions, PDFs, and PNG.
Article by Jon Lackman, on Slate magazine, about an alternative periodic table, shaped as a galaxy, designed by Oxford ecologist Philip Stewart. Includes a slide show and pictures.
[Very comprehensive data, write-ups, extensive listing of nuclides] Data on elements includes scores of properties, element names in a dozen languages and almost all known nuclides. Environmental chemistry articles round out site.