Howard Hughes Medical Institute Grants for Individuals
Official site: http://www.hhmi.org/grants/individuals/
Final Deadline: Varies, Check Website
HHMI administers several programs that provide funding to medical, dental, and veterinary students.
"HHMI grants support promising biomedical research scientists who are foreign citizens or members of groups underrepresented in the sciences; medical, dental and veterinary students seeking research training; and leading research scientists who are developing new approaches to undergraduate science education." ~from Website
Visit the website for more information on individual programs.