See "Graduate Student Awards and Prizes" to see funding awards of current and past graduate students.
An informal list of opportunities:
University Dissertation Research and Dissertation Completion Fellowships (Penn)
American Philosophical Society
Consortium for the History of Science, Technology and Medicine
Linda Hall Library Fellowship program
Smith Richardson Foundation https://www.srf.org/programs/international-security-foreign-policy/world-politics-statecraft-fellowship/
Mellon/Penn Program in the Environmental Humanities Fellowship