Of Moons and Gules: Luna's collection of links to tutorials, and materials

Fabric:

period fabric   (mostly medium to heavy weight wool)
Dormill Store    (nice selection, but pricey)
renaissance fabrics   (also sells silk and linen)
WM. booth draper (lovely selections)
carolina calicoes (wool & linen)
Fabric Store   ( use ILOVELINEN to save 7%)
Wool trade (fair selection)
Fabric and art (cotton velvets and ribbon, etc)
faserhaus.com ( Good variety of wool for early periods, and dye stuffs)
dharmatrading (Silk, Linen, Dye, etc)
B Black & sons (wool and linen. $$)
Silk Baron ( Silk )
Recreated-textiles ( wool fabric, and different spinning materials)
burnley & trowbridge (wool, linen and silks)
Elfriedes Fine Fabrics (wool and more, good prices)
Vogue Fabrics (swashes are $1, free shipping)
G street fabrics (silk,wool, linen)
96fabrics (wool,silk, + more )
fabric.com (many options)
Fabric Guru (nice sales! Wool/silk/more)

Crafting Materials:
high density cork (for chopines, etc)
Make your own Medieval (buckles, purse hangers, etc)

Tutorials:

Of Moons and Gules