An incredible archive of old scientific books and articles.
African Activist Archive
This project is preserving records and memories of activism in the United States to support the struggles of African peoples against colonialism, apartheid, and social injustice from the 1950s through the 1990s.
Lev Vygotsky Archive
Vygotsky (1896-1934) was a Soviet psychologist, a pioneer in many fields and founder of cultural-historical psychology, his work is really interesting but only in the 80s it was rediscovered and studied only.