Arguably the most famous just intonation piece is La Monte Young's 5-hour The Well-Tuned Piano Other just intonation or microtonal works: Terry Riley - The Ha

Arguably the most famous just intonation piece is La Monte Young's 5-hour The Well-Tuned Piano Other just intonation or microtonal works: Terry Riley - The Harp of New Albion Glenn Branca's Symphonies #3 and #4 Lou Harrison - Piano Concerto Karlheinz Stockhausen - Studie II (81-step microtonal scale)