GrantsNet - A one-stop resource to find funds for training in the biomedical sciences and undergraduate science education. Through the support of HHMI and AAAS, this service is completely free.
Community of Science (COS) - World's leading online resource to identify funding information related to research, collaborative activities, travel, curriculum development, conferences,felwships, post-doctoral postions and equipment acquisition. Opportunities can be searched by sponsor, amount, deadline, eligibility of applicant, funding type, and area of interest.
National Institutes of Health (NIH) - The NIH website has many helpful resources but can be a handful to navigate if you're unfamiliar with it. This link takes you straight to the Funding page, where you can search the NIH Guide listing Program Announcements (PA's) and Requests For Applications (RFA's), as well as review Frequently Asked Questions, deadlines, etc.
You can also search the Guide by Volume (year), or check out a specific institute's page, etc.
UCSF Department of Medicine Funding Opportunities Database - Updated monthly. You can search by individual criteria or view all records.
UCLA Funding Opportunities Website - Provides direct links to federal and private funding agencies.
Cornell University Fellowship Website - The Cornell University Graduate Fellowships website is an alphabetical listing of opportunities, the majority of which are from non-Cornell sources. Each alphabetical listing is a link to the sponsoring organization.
NIAID Division of AIDS - Outlines available NIAID funding for AIDS vaccine research, including preliminary studies and innovation grants, and general AIDS research.