One of the most prolific design houses across the grid would have to be PixelDolls. This was one of the first places I discovered nearly 3 years ago after entry into this virtual world, and I have been regularly drawn back ever since. There is always a sale, the clothing is unique, and you can never have too much PixelDolls gear.
I could go on and on forever, almost.
Skin: June Sundust Allium2 dark by Curio
Hair: Isabella in Treacle by Truth
Shoes: Malama in gold by R2
All clothing from PixelDolls – this will take you direct to the current $10 L Retirement Sale