There are many other types of fellowships and grants at Brown that are supported by other offices on campus. By no means is this an exhaustive list, but it will give you a good start on finding the type of funding that you may need that the Fellowships@Brown office does not manage:
Brown's Undergraduate Research page contains links to a variety of programs, such as the Mellon Mays, the Research at Brown grant, and the Undergraduate Teaching and Research Award (UTRA).
For community-engagement and social-justice initiatives, check out the Swearer Center's Programs page to investigate the Royce Fellowship, the Brown in Washington program, the Engaged Scholars Program, Careers in the Common Good internships, and many more.
For internship opportunities, go to Brown's CareerLAB, which also houses BrownConnect, where you can network with Brown alumni.
Summer Research Experiences for Students: Jobs in biomedical science research for high school and college students and science teachers. The NIH provides grantee institutions with funds to support summer research experiences for students and teachers across the country. Biomedical science programs at many research universities, institutes, and teaching hospitals participate in this program.
Taking It Global: Online community of youth interested in global issues and creating positive change.