A ton of examples of really interesting and cool draping on a dress form - patternmaking;
What shape to cut the fabric into to get each specific Flounce (and billions of other tutorials at 365 sewing)
Manipulating Fabric – Charlotte Sometimes
Pattern making, draping and moulage - Innovative techniques to check out!
Draping on the stand - ruffle dress development - pattern making;
Working on the stand (dressform): Draping (pleating/gathering)