TouchSky is a astronomical 3D viewer. It permits to visualize IMG_HDU in fits files but also large images stored in a multi resolution format (pyrfits = pyramid of fits) accessible through dedicated servers (one with some pyrfits is publicly available at our laboratory OpenStack system). This application prepares 3D visualization of images of next generation large CCDs telescope as the LSST one. This application permits also a 3D visualization of HEALPix large data set by using a dynamical and interactive skullcap spherical system.
For a demo in English see : http://softinex.lal.in2p3.fr/download/TouchSky/etc/demo_English.mov
For a demo in French see : http://softinex.lal.in2p3.fr/download/TouchSky/etc/demo_French.mov
These demos can be found on YouTube with "Barrand TouchSky".