DOAB - Directory of Open Access BooksDOAB is a community-driven discovery service that indexes and provides access to scholarly, peer-reviewed open access books and helps users to find trusted open access book publishers. All DOAB services are free of charge and all data is freely available.
DOAJ - Directory of Open Access JournalsDOAJ is a unique and extensive index of diverse open access journals from around the world, driven by a growing community, committed to ensuring quality content is freely available online for everyone. All DOAJ services are free of charge including being indexed. All data is freely available.
IntechOpenRead, share and download more than 6,400 peer-reviewed Open Access books.