For libretti (poems), see under the heading 'Wagner' at Opera Glass:
  < http://opera.stanford.edu/index.html#libretti >. There are a few
  of Wagner's libretti (poems) at the German Gutenberg Project
  < http://gutenberg.spiegel.de/ >.

There are shareware editions of the 'Ring' libretti with Jameson's 
English translation at 
  < http://home.earthlink.net/~markdlew/shw/Ring.htm >.

There is a hypertext libretto of 'Tristan und Isolde' here:
  < http://unchance.net/Liebestod/ >

The following vocal scores can be accessed through the Web:

Der fliegende Holländer: 	
  < http://www.dlib.indiana.edu/variations/scores/bhq6743/index.html >
Das Rheingold:		 	
  < http://www.dlib.indiana.edu/variations/scores/bhr5451/index.html >
Die Walküre:		
  < http://www.dlib.indiana.edu/variations/scores/bhr9607/index.html >		 
Götterdämmerung:	
  < http://www.dlib.indiana.edu/variations/scores/bhr1272/index.html >
Tristan und Isolde:		
  < http://www.dlib.indiana.edu/variations/scores/bhr3456/index.html >