Google Play Books - Google Play Books lets you search, preview, and buy millions of books using Google Book Search.
DSpace - DSpace open source software enables open sharing of content that spans organizations, continents...
Amazon Kindle - Amazon Kindle software lets you read ebooks on your Kindle, iPhone, iPad, PC, Mac, BlackBerry, and...
Koha - Koha is the first free and open source software library automation package (ILS).
LibriVox - free public domain audiobooks
Greenstone Digital Library - Greenstone is a suite of software tools for building and distributing digital library collections...