Wonder Girl was made from a Wind Blitz Batgirl.

Robin was made from a Spectrum of the Bat Robin.  The cape is cloth.

Kid Flash was made from a Bola Trap Robin.  This figure required a bit of smoothing out with contour putty to remove the grooves from his outfit.

Starfire was made using a Harley Quinn body and head, while a modified Creeper boa serves as the hair.

Cyborg's body is a somewhat modified Ski Blast Robin, while the head is borrowed from a Shaq Steel figure.

The Changeling was made from a Crime Fighter Robin.

Raven was made from a Paris Elegance Anastasia.  The bottom of the dress was cut open and slit down one side.  Then a partial leg from a Toy Biz Dagger was glued inside the skirt.  The cloak is cloth.