Search for a specific speech (i.e. Martin Luther King's "I Have a Dream" speech) or do a basic search like "famous speeches."
Finding Speeches
Sometimes looking at other people's speeches will help you come up with a topic and give you an idea of "best practices" for public speaking. You can also use famous speeches (such as FDR's fireside chats) as audio/visual aids in your own speeches.
Database of and index to 5000+ full text, audio and video versions of public speeches, sermons, legal proceedings, lectures, debates, interviews, other recorded media events, and a declaration or two.
"On TED.com, we make the best talks and performances from TED and partners available to the world, for free. More than 1400 TED Talks are now available, with more added each week. All of the talks are subtitled in English, and many are subtitled in various languages. These videos are released under a Creative Commons BY-NC-ND license, so they can be freely shared and reposted."