NOTATION:
Most comprehensive site:
Note naming/games links
Notes on the treble and bass staff:
http://www.msu.edu/~pierso10/Notes%20of%20the%20Treble%20and%20Bass%20Clef.html
Note reading exercises:
http://www.teoria.com/exercises/notes.htm
Note reading drills(requires java which you can download for free) :
http://www.emusictheory.com/practice.html
Note reading speed drill:
http://www.emusictheory.com/drillSpeedReading.html
Note Name Game (nice graphics):
http://musictheory.redzeppelin.org/musicnotegame.php
Musical Notation:
http://www.ericweisstein.com/encyclopedias/music/topics/MusicalNotation.html
Note names and piano keys:
Click on a key and see how it is written on the staff: http://www.teoria.com/tutorials/reading/16-keyboard.htm
http://www.MusicTheory.net
Piano Key Finder Drill:
http://www.emusictheory.com/drillPianoKeyFinder.html
Rhythm Drills:
http://www.emusictheory.com/drillRhythmPerf.html
Interval Trainer:
http://www.good-ear.com/servlet/EarTrainer?chap=0&menu=0