Ø OpenStax College (Text books for Undergraduates from Rice University, USA)

Ø Open Text Book (Gateway to access text books of several prestigious Universities of USA) ,

Ø DOAB

Ø Hathi Trust (Collection of millions of titles digitized from libraries of academic & research institutions around the world )

Ø World Digital Library

Ø OAPEN (Freely accessible academic books, mainly in the area of Humanities and Social Sciences from Europe)

Ø Digital Book Index (Search Millions of books through Single window)

ØNational Digital Library

Ø INTECH (Engineering and Physics)

Ø Bengali Books (Rare Bengali Books from University of Heidelberg)