http://en.wikipedia.org/wiki/Early_music
Article about Early Music on online encyclopedia Wikipedia

http://www.earlymusic.net
Early Music Network - International Early Music Society
 
http://earlymusic.org
Early Music America
 
http://em.oxfordjournals.org
Oxford Journals Early Music
 
http://sscm-jscm.press.uiuc.edu/jscm/ 
Journal of Seventeenth-Century Music

http://www.concerto-verlag.de 
German magazin for Early Music Concerto
 
http://www.tonalemusik.de/musiklexikon.htm 
Online music encyclopedia (german language)
  
http://www.finalemusic.com/notepad/ 
Finale Notepad - free music notation software 
 
http://www.musikinstrumentenboerse.de
Online markt for music instruments (german language)