Best World Free Digital Libraries http://www.e-book.com.au/morefreebooks/freedigitalibraries.htm

Digital Library Federation http://www.clir.org/dlf.html and http://www.diglib.org/dlfhomepage.htm

Digital Library Resources http://www.lhncbc.nlm.nih.gov/

DIGITAL LIBRARIES: Resources and Projects: Collections http://archive.ifla.org/II/diglib.htm

Digital Libraries http://en.wikiversity.org/wiki/Curriculum_on_Digital_Libraries 

Europeana http://www.europeana.eu/portal/

History and definition of digital libraries http://www.southernct.edu/~brownm/dl_history.html

World Digital Library http://www.wdl.org/en/