You can find federal agencies’ program announcements on their websites and on Grants.Gov. You can also find them here because DoResearch provides a data feed from Grants.Gov and Pivot as well as links to internal funding opportunities, and limited submission applications. You can save links to funding opportunities that interest you to by clicking "My DoR" located in the right corner of every DoResearch website page.
In addition, the School of Medicine in conjunction with Vice Provost and Dean of Research offers a website containing curated funding opportunities for all disciplines and internal funding opportunities.