dress diaries 
Demode
Historically Dressed
Koshka's Costume Site
Jenny La Fleur
Maggie's Costume Site

shops 
Gewandschneider - great seamstress & beautiful authentic work
La Pompadour - atm she is taking a break but her riding habits and wedding dresses are gorgeous
Fantasy Kleidung Online
Ars Et Metier
Nehelenia's Designs

forums 
Kostüme Gar Garstig
Fantasy Kleidung
Empire Kultur