Here are links to some very interesting websites containing information about historical clothing that is off the beaten track of ancient Rome/migration period/medieval England and France/Renaissance etc. costume. Most of the areas below are hard for the beginning researcher to find information about. They should help people wanting to explore truly different areas of clothing history, and at the very least they are interesting to read!
1. Clothing in the Netherlands, 1480-1610: Between the two of them, Margaret and Karinne show the rest of us how people in the Netherlands dressed between the late 15th and early 17th centuries. I first met Karinne through the now-defunct MedCos forums, and her skills have, if anything, improved since then. Go here to explore Margaret and Karinne's creations and research.
2. Sarmatian Costume: Here's an interesting alternative to all those Elizabethans, Vikings, and Romans: a Sarmatian persona! The Sarmatians are a Central Asian people who migrated into Southern Russia and the Balkans and settled there between the 6th and 4th centuries BCE. Jess Miller-Camp's blog, Sarmatian in the SCA, has interesting information about her research into Sarmatian culture, including her work on Sarmatian costume. You can find the blog here.
3. Middle Byzantine: You may be familiar with Timothy Dawson's Middle Byzantine site, Levantia, but Anna of Anachronistic and Impulsive, covers much of the same costuming ground from a somewhat different perspective. The blog's home page is here. As a side note: Do not miss her post about making ancient Mesopotamian costumes for herself and her spouse!
4. Medieval Korea: This information about how a 16th century CE Gisaeng might have dressed is available due to the research skills of Rebecca Lucas LeGet/ Find it here.
5, Medieval Japan: There are a number of pages out there on medieval Japanese costume, but this one is fairly detailed and well-organized--for men's costume. There are places for information about women's costume, but they have not been written yet. You'll find the index here.
Enjoy the extra reading, and have a good summer (or winter, if you're in the Southern Hemisphere).