Canada Revenue Agency: Searchable directory of Canadian charities.
CharityCan: Searchable database of charitable gifts in Canada.
FPinfomart: Subscription access to Canadian news content and archives.
GuideStar: US Non-profit Directory.
Million Dollar List: Great list of million dollar US donors from The Center on Philanthropy at Indiana University
Portico: Outstanding collection of prospect research links from University of Virginia.
Prspct-L: The prospect research discussion group.
SEC Edgar Search: Search the US SEC’s database of filings on publicly held companies.
SEDAR: Canadian Securities Administrations (public filings).