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From the "au" domain:
Notable for originality, textures


From the "net" domain:
Notable for modelling, lighting, originality


From the "ca" domain:
Notable for lighting


From the "se" domain:
Notable for composition, lighting


From the "com" domain:
cute concept, though not obvious from the picture


From the "com" domain:
Just say no to hourglasses.


From the "net" domain:
nice picture
Notable for modelling


From the "be" domain:
Notable for modelling


From the "fi" domain:
Nice idea.
Notable for modelling, composition, originality


From the "in" domain:
Notable for modelling


From the "edu" domain:
Notable for modelling, originality


From the "com" domain:
Fun!
Notable for originality


From the "net" domain:
quite cool.. i like the idea of optically sensing the falling sand.
Notable for originality