- Stockhausen, Klavierstück XI for piano (see the score here; fuzzy—sorry)
- Berio, Sequenza I for flute (see an excerpt here)
- Pousseur, Scambi for tape (hear realizations of it here, and glance at the notes explaining how each performer realized the piece)
- Boulez, Third sonata for piano (see a performance here; note how the performer has to manipulate the pages of the score.)
Other works of possible interest:
Wolfgang Amadeus Mozart (attributed; 1792), Musical Dice Game
Earle Brown, December 1952