San Diego Public Library
Digital Public Library of America
National Science Digital Library
Digital Public Library of America is a free digital public library that focuses on the collection of items that span the American experience.
High quality science, math, engineering and technology resources for K-12 students, teachers and faculty.
Digital Public Library that features directories of online texts, newspapers, magazines and reference materials
International Children's Digital Library
Multicultural Digital Library of free digital children's books.IN