Chromoscope has been created using public-domain datasets from a number of all-sky astronomy projects. It lets you easily move around the sky and fade between wavelengths using a simple user-interface to illustrate the similarities and differences between what is visible at each wavelength.

There are currently seven included: gamma ray (Fermi), X-ray (ROSAT), H-alpha (WHAM), optical (DSS), infrared (IRAS), microwave (Planck) and radio (Haslam). You can click on the credit information, shown at the bottom-right of the Chromoscope screen, to learn more about each survey.