National Science Foundation, Integrative Graduate Education and Research Traineeship (IGERT) Program
Official site: http://www.igert.org/
Final Deadline: Funding ended October 1, 2015
The program trains graduate students pursuing Ph.Ds who are interested in exploring interdisciplinary questions in mathematics, science and engineering. They are especially interested in underrepresented groups including women and minorities.
Visit the website for more information.