Practice Sight-Reading on the Piano in 22 Categories:

Piano Chord Tools

Test Your Piano Chord Knowledge
Flash-based piano chord finder
My most popular piano chords video from YouTube
48 piano chords in two mintes eleven seconds
My YouTube Piano Chords Channel
The "two-five" piano chord pattern animated
The "two-five" piano chord pattern animated with 9ths and flat 9ths
Using fourths to find piano chords -- part 1
Using fourths to find piano chords -- part 2
List of 72 basic piano chords
Printable piano chord chart
Minor thirds and how they relate to diminished chords

Ear Training Tools

Learn to hear half-steps and whole-steps
Study solfeggio with a randomly generated melody (easy)
Study solfeggio with a randomly generated melody (hard)
Musical interval training

Note and Rhythm Tools

Test Your Knowledge of the Note Names on the Piano
Learn the Lines of the Treble Clef and the Lines of the Bass Clef
Learn the Spaces of the Treble Clef and the Spaces of the Bass Clef
Practice Sight Reading in Both Clefs by Simply Typing the Name of the Note
Memorize the note names of the lines above and below the staff in both treble and bass clef
Practice sight-reading treble clef notes
Practice sight-reading bass clef notes
Practice sight-reading with the "Alien Note Killer" game
interval shapes for sight-reading
Learn rhythm videos