From Revolution to Reconstruction: Presidents - An index on the presidents of the United States containing not only their speeches but also writings, biographies and anything else related to their person or the office they are holding.
Google and other audio/video sites are very good sources for the text, audio, and video of speeches. Just type I have a dream speech or chief seattle speech or fidel castro speeches and you will get the whole text of these speeches.
Video Encyclopedia of the 20th Century - contains digitized film and video clips covering the social, cultural, and political history of the 20th century from 1893 to 1989, including speeches of leading figures.
Vital Speeches of the Day - prints in full the important addresses of contemporary leaders of public opinion from 1934 to the present, with an emphasis on government and business leaders. From 1934-1999 look in the microform area under microfilm MF165. From 1999 to 2003 look in the Periodicals Collection under PN 6121 V52. A cumulative index covering 1934-1959 is available. Vital Speeches of the Day is also available through the Academic Search Elite database from 1985 to the present.
Newspapers are also a good source for speeches. Check either the same day or a day or two after the speech is delivered in various newspapers in the Periodicals Collection for recent issues or in the Microform area for older issues.
Databases for Content for Communication Speeches
These databases cover current events and may be especially good for finding information for speeches. For other ideas, please Ask a Librarian.
[NewsBank] Full text of many California newspapers, including Sacramento Bee, San Francisco Chronicle, San Diego Union-Tribune, and San Jose Mercury News, as well as local newspapers and America's News Magazines. Dates of coverage vary, from 1984 to date.
[Ebsco] Offers references to scholarly, government and general-interest publications covering all the aspects of human impact to the environment. Topics include global climate change, green building, pollution, sustainable agriculture, renewable energy, recycling and many more.