American stucco

Synthetic Stucco
http://www.askthebuilder.com/130_Cement_Stucco_Synthetic_Stucco_EIFS.shtml
EIFS (exterior insulation and finish) Wikipedia

Although often called "synthetic stucco", EIFS is not stucco. Traditional stucco is often called Portland Cement Plaster, and is a centuries-old non-insulating material. Stucco consists of sand, Portland Cement, and water, and is a hard, dense, thick, non-insulating material. EIFS is a lightweight synthetic wall cladding that includes foam plastic insulation and thin synthetic coatings.

So according to wikipedia, EIFS is a foam sheeting that is glued to the wall which is then coated with acrylic stucco which has all the adhesives and special stuff in it.

Parex
http://www.parex.com/
Is a company who make stucco products. They stock EIFS and acrylic stucco.

Hard Stucco
Hard stucco is the traditional stucco that i have used very often.
http://www.europeanstucco.com/hardstucco/hardstucco.htm
http://www.stuccoguru.com/resources/article.cfm?articleID=E-04050&resourceID=5