Sites which do not directly deal with any of the other categories, but are still of more or less direct interest to mandala creators and appreciators.
For Jung, mandalas are "vessels" into which we project our psyche. This page contains an extensive listing of Jung resources on the Web and much more.
"This reference tool enables a student, librarian, or teacher to identify superlative sources of information about a subject of inquiry, viewed through the lens of expert opinion." Search for Mandala and see the sites selected by Clare Goodwin, Infography's Mandala Expert!
A Tibetan Buddhist Journal
Anna Wolfe offers a lovely New Mexico retreat & learning center with round walls!
Imaginatorium has a collection of mandala jigsaw puzzles from Japan.
A listing of mandala books published in India. Most of these books are not available from Amazon.com or other US sources. Vedam's sells the books at a discount.