Russiatrek.org's blog has a nice collection of Soviet propaganda posters. Soviet space program 1958-1963 Part 1. Part 2. International Workers' Day. Soviet Patriotism. Soviet propaganda - the beginning 1917-1923. Stalin's Soviet Union tourism posters. Socialism vs. Capitalism. WWII Part 1. Part 2. Soviet posters of the 1970's. The blog's art category.
ROMANO-Archives has a YouTube channel with over 270 color film clips, called Unknown WWII In Color. "World War ll has usually been seen in black and white, but our recent research has unearthed an abundance of superb color film that shows what it really looked like to those who were there. The Author presents mainly WW2 recently declassified and other previously unavailable material, exclusively filmed in color." They also have over 900 videos of Automobile History USA l lots of pages of images with history, like Jammin' with Betty Boop. [In English and Italian] [more inside]
Free Speech Doesn't Mean Careless Talk! World War II posters from the US Merchant Marine at War. More posters (Rivets are Bayonets, Drive them Home). There's lots of other cool stuff, like this brief history of privateers during the Revolutionary War.
Battlefield 1942 Propaganda Posters are very handy for the times when you need to call someone a smacktard.
BUY WAR BONDS! An archive of vintage WWII posters, in case you've got a hankerin' for a little bit of that ol' timey propaganda.