Express Stave by John Keller
Here are links to the descriptions of three versions of Express Stave notation:
Some YouTube tutorials:
"Music Theory and Express Stave Notation"
"Dueling Bass: Traditional vs Alternative Music Notation"
"A new way to read the Bass Clef: tutorial plus Name the Tune"
The following free piano sheet music is now available in Express Stave (PDF format):
J S Bach: Prelude 1 (C major), Well-tempered Clavier Book 1 (transposed into all 12 keys)
J S Bach: Two Part Invention 1 in C major (Reverse Colour Express Stave)
J S Bach: Two Part Invention 4 in D minor (Reverse Colour Express Stave)
J S Bach: Two Part Invention 7 in E minor (Reverse Colour Express Stave)
J S Bach: Two Part Invention 8 in F major (Reverse Colour Express Stave)
J S Bach: Two Part Invention 10 in G major (Reverse Colour Express Stave)
J S Bach: Two Part Invention 13 in A minor (Reverse Colour Express Stave)
Beethoven: Moonlight Sonata, Op 27, No 2, Movements 1, 2 and 3
Chopin: Black Key Etude, Op 10, No 5
Chopin: Revolutionary Etude, Op 10, No 12
Chopin: Fantasie-Impromptu, Op 66
Chopin: Prelude in E minor, Op 28, No 4
Chopin: Minute Waltz, Op 64, No 1
Chopin: Waltz in Ab, Op 69, No 1
Chopin: Mazurka in F minor, Op 63, No 2
Chopin: Nocturne in E flat Major, Op 9, No 2
Debussy: "What the West Wind Saw" (Reverse Colour Express Stave)