Besides silicone breast implants, or saline breast prostheses, what else is out there?

Cohesive Gel Breast Implants (Gummy Bear Breast Implants), Hydrogel Breast Implants (Hyaluronic-Acid Filled Breast Implants), PIP Hydrogel Breast Implants, PIP Saline Breast Implants, Trilucent Breast Implants (Peanut Oil Breast Implants, Soy Oil Breast Implants, Soya Oil Breast Implants, Soybean Oil Breast Implants), Hydrophilic Polyacrylamide Gel Breast Implants.