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.
Peasant! Free your pregnant wife from work, don't allow her to pick up heavy items since this will harm her and the child. An excellent collection of vintage soviet propaganda, public health, and infographics posters from 20s to 30s, many with full translations.
USSR Posters. Gallery of over 1400 posters from the Soviet era.