American Anthropological Association
http://www.aaanet.org/profdev/fellowships/index.cfm
A list of national and international fellowship opportunities.

The American Historical Association
http://www.historians.org/members/Grants/index.cfm
The AHA offers several resources on grants: a calendar with lists of Awards and Fellowships, a list of grants for members only, and a "grant of the week" feature on the AHA blog.

American Psychological Association Science Student Council
http://www.apa.org/science/apassc-funding.html#resources
A list of resources for graduate students in psychological science, withadvice on grant writing.

The American Studies Association
http://www.theasa.net/prizes_and_grants/
A list of ASA prizes and grants.

The German Historical Institute, Washington, DC - Funding Guide
http://www.ghi-dc.org/index.php?option=com_content&view=article&id=208&Itemid=101
The GHI has published a very extensive and comprehensive guide of opportunities for funding, which was published in 2005 – while it is not that up to date any more, it is among the most comprehensive lists of funding resources for Americans and non-Americans. The guide is available online at the link above.

Latin American Studies Association
http://lasa.international.pitt.edu/members/research-study/index.asp
Has a good list/calendar of fellowships in all fields (not only related to Latin America), which is also accessible to non-members.

The Organization of American Historians
http://www.oah.org/activities/awards/
This webpage includes a long list of fellowships and prizes of interest to Americanists.

UC Davis Humanities Institute: Grants, Fellowships & Residencies
http://dhi.ucdavis.edu/?cat=3
The UC Davis Humanities Institute supports the intellectual and professional development of graduate students in the humanities and humanistically-oriented social sciences. Our programs promote cross-disciplinary interaction among grad students and between grad students and faculty. We encourage active grad student participation in Research Clusters and other Institute programs and events. Additionally, we administer two different fellowship programs for graduate students, the Presidents’ Predoctoral Fellowship and the Research Assistantship in the Humanities. Grad students may also search through the database of current fellowship, postdoctoral, and conference opportunities, using the search box on their webpage: http://dhi.ucdavis.edu/?page_id=926

Washington University-St. Louis - Department of History Funding Resource Page
http://history.artsci.wustl.edu/resources/funding
The Department of History maintains a list of some funding sources.

Yahoo! Grant Links
http://dir.yahoo.com/Education/financial_aid/grants/
A link to Yahoo!'s directory of grants.