Merck KGaA (Darmstadt, Germany)
EMD PTE
You can't tell by the title, but this is a functional periodic table of elements. Incorporating bright colors, lucid text, and easily operated features, this application serves as a valuable reference tool for your chemistry class.
Duke University
Duke University: The Color Force
What does color have to do with particle physics? This page explains the concepts of color and the color force, which are fundamental subjects in quantum chromodynamics.