JAM notation

JAM is both the software and file format for representing music as human-readable and human-writable text. Unlike the ABC notation, another text-based music format, that is best suitable for one-voice tunes, JAM is mainly focused on chords.

Here is an example of jam notation: Dm7 Bm7-5 | E7  A7   | Dm7 /  | Gm7   C7 F+7 F7    | Bb+7 Bbm7 | F+7 /  | Em7-5 A7 Dm7 Bm7-5 | E7   A7   | Dm7 /  | Gm7   C7 F+7 F7    | Bb+7 Bbm7 | F+7 C7 | F+7   / Am7-5 D7   | Gm7  /    | Gm7-5 C7 | F+7 / Am7-5 D7   | Gm7  /    | Gm7-5 C7 | F+7 A7 Dm7   Bm7-5 | E7   A7   | Dm7   /  | Gm7 C7 F+7   F7    | Bb+7 Bbm7 | F+7   C7 | F+7
 * 1) LULLABY OF BIRDLAND

The software is proprietary, windows-only freeware.