This's a only Japanese site.
A very lovely material.

G.B Materials
Yuri's Holiday
Coco*
1 kilobyte's Materials
M-SPIRAL
Toy Box
fine
Sweet Rabbit
Megurin Org.
May Fairgarden
Honobono
Gentoo Bar
Cute*e
Free gif Yamaaruki net.
KOZOU's Sozai Garage