Despite what you might think, Speaking Frog has nothing to do with French people learning English; it's a site which features videos and transcripts of speeches by famous people, past and present, real and fictional. The nice thing about the site is that the videos and transcripts are presented side by side, so that you can read the transcript, or refer to it, as you watch. Here, for instance is Barack Obama's Second Inaugural Address from January 2013.
You can find a list of recent posts here.
• 10 famous speeches in English, and what you can learn from them (English Trackers)
• Famous Speeches (History.com)
• Great Speeches of the Twentieth Century (The Guardian)
• American Rhetoric