Resources having to do with various forms of media, various media topics and various media archives throghout the ages.
Old Time Radio - Surviving radio show recordings (169 series–over 12,000 individual shows) from the 1920's to the 1950's–all in mp3 format and downloadable (most of the time - the site seems to be a bit dodgey due to being a beta version). There's a few science fiction shows (Dimension X, X minus One, Mysterious Traveler, etc.) that became the basis for the Twilight Zone and Outer Limits and so forth, as well as numerous comedy and variety shows. There's even some old newscasts (including BBC's copies of Churchill speeches).
Database of vintage newsreel videos - Register for free and access the entire catalog of the site's clips.
The New York Public Library Picture and Photo Collection
British Pathé - As of spring 2014, the entire 85,000-film archive of the UK newsreel archive company has been uploaded to YouTube in HD. The collection, which spans 1896 to 1976, comprises some 3,500 hours of historical footage of major events, notable figures, fashion, travel, sports and culture. It includes extensive film footage from both World War I and World War II.
Map of Britain on Film - All the BFI films (the short ones are free to view) on a map of the UK. If you zoom in it breaks it down more precisely by geography.
Retro Space Images.com - High Resolution Mission Image Discs from the Mercury, Gemini, Apollo and STS missions.
Quote Investigator.com - “Exploring the origins of quotations”.
Interesting old footage and recordings
FreezeFrame.ac.uk - Historic Polar Images, 1845-1982, from the Scott Polar Research Institute. Highly recommended if you're looking for authentic, vintage polar exploration photographs.
TheLocationGuide.com - Website about pre-production location scouting for films and television series.
MovieMaps.org - “MovieMaps is a directory of movie and TV show filming locations. Lookup where your favorite TV show was shot or discover movies that were filmed near you.” A simple and highly useful site for checking filming locations of OTL film and television works.
NotStarring.com - Website about which actors and actresses were originally planned for various film roles or unsuccessfully auditioned for them.