Angelina fibers are thin angel-hair-like fibers that you spread out and iron with a cool iron. They fuse to themselves creating a crystalline sheet of "fabric" that you can sew like anything else. They come in different colors and sheens. I got mine from "Embellishment Village" online.
The hot fix crystals are little rhinestones with glue on their flat side. You hit them with an iron to activate the glue, and they stick to whatever you're ironing them to. I forget where I got them, but you can find them online by simply doing a search for "hot fix crystals."