The Medieval Combat Society; Thirteenth and Fourteenth Century Female Civilian Costume; http://www.themcs.org/costume/14th%20century%20Female%20Clothing.htm
Manuscript Miniatures http://manuscriptminiatures.com
Effigies and Brasses http://effigiesandbrasses.com
The Compleatly Dressed Anachronist http://www.edythmiller.blogspot.com
Medieval Silkworks http://www.medievalsilkwork.com
By My Measurehttp://www.bymymeasure.com
La Cotte Simplehttp://www.cottesimple.com
The Brazen Burgundian- The inventories here have been invaluable to me to truly start to comprehend the scope of garments and popular colors. Check out his translation projects page for the museum write up on the Prague houppelande!
Age of the Cotehardie, Facebook grouphttps://www.facebook.com/groups/552948401398913/
14th century stitches, Dame Helen http://www.damehelen.com/clothing/sewing/
Some clothing of the middle ages; Marc Calrson; http://www.personal.utulsa.edu/~marc-carlson/cloth/bockhome.html
The English Fur Trade in the Middle Ages .https://www.british-history.ac.uk/london-record-soc/vol38
The many glorious articles of textiles and coinage by John H. Munro. Seriously this is a huge treasure trove of in depth research!https://ideas.repec.org/e/pmu10.html
Le ménagier de Paris: traité de morale et d’économie domestique composé vers 1393
And of course there are many many manuscripts that are online in their entirety at many museum websites!