The “Heroes of Might and Magic” online magazine.

Very professional design and presentation.

The humor was great:

An Ogre is cutting an Elf's hair.
Ogre: Do you need ears?
Elf: Yes!
Ogre: Here! Take your ears.

If you need themes from professionals for Hmm3, take a look at the physics mod by AmberSoler.
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There’s also a lot of information about heroes here:
Hmm3
http://www.heroesportal.net/library/index.php?version=h3&page=physic

Hmm2
http://www.heroesportal.net/library/index.php?version=h2&page=physic

and so on; you can find everything else there as well, regarding other versions of Heroes.