Most coherent, developed, tested materials

Color images:

Movie (11:09) on making 3-color images using IRSA's Finder Chart, ds9, and IRSA Viewer -- Dr. Luisa Rebull (2017 .. note that the tools have changed since this movie was made!)
How can I make a color composite image using Spitzer and/or other data? - vintage wiki materials (look at history to see who/when edited it)

Somewhat less coherent (or less standalone) materials