Greatest Speeches of the 20th CenturyThe Internet Archive is building a digital library of Internet sites and other cultural artifacts in digital format.This site has 56 speeches in their original recordings. Listening to a speech can provide a lot of insight into the person who is speaking.
The speeches are listed alphabetically by the title of the speech.
The History Place: Great SpeechesThis site offers not only the text of speeches, it offers audio and a brief introduction into why each speech is historically important.
The speeches are arranged alphabetically by the speaker's last name.
American Rhetoric Top 100 SpeechesListen to recordings of speeches on this site. You can download the audio and a PDF of the original speech as written and delivered.
Biography OnlineIncludes extensive biographies for most of the people you are researching.