I'm sure most of you know about Spoonflower, the website where you can design and print your own fabric. Recently I spend a fair amount of time monkeying around on Spoonflower with images of 18th and early 19th century prints, while I haven't gotten my swatches yet they look promising!
I also spent a lot of time drooling over all the gorgeous fabric I've seen on the site. The sheer volume of beautiful fabrics other costumers have created on Spoonflower is astounding - here's a sampling of some of my favorites.
bonnie_phantasm has a repro of the black and white fabric from Sabrina's iconic dress and several versions of amazingly lovely large butterfly wings that would be great for dresses, costumes or fairies. I suspect this may be the fabric the "butterfly girls" I saw at Myth Masque used. She also has some cool Tron-like fabric and TARDIS plushies!
Are you looking for the fabric for Scarlett's barbeque dress? Or Katrina's black and white stripes from Sleepy Hollow? mellymellow has a whole host of wonderful movie repro fabrics in her shop, including three fabrics from the Marie Antoinette movie. You may have seen Maggie's lovely recreation of the the "strawberries" dress using mellymellow's fabric.
Speaking of 18th century, americanduchess has a very pretty collection of reproductions of 18th century fabrics in her shop, from 1740 to the regency, mostly in florals and stripes perfect for that pastoral look.
Accessory fans may want to check out carlyweggeland's shop. She's got 8 historical fan designs, 18th Century to Regency - including one featuring a portrait of the Duke of Wellington!
Aimee's shop has fun fabric for a variety of looks from sweet Lolita looks, to mid-century tikis to Rapunzel fabric and a Pride and Prejudice toile. Check it out!
Want something for the littlest costumer in your life? megneticcatholic has some adorable soft book classics you can sew to make baby's first "Little Women" or "Scarlet Pimpernel."