Two from Dimitri Kirsanoff, the aforementioned Menilmontant, and the later Brumes D'Automne (1929). A more rhytmic film but very similar, and even featuring the same lead actress. A similar heavy empshasis on superimposition and dreamlike narrative structures.
Lot In Sodom (1933) is another prominent experimental US film co-directed by James Sibley Watson and Melville Webber. This one takes the decadence one would expect from the title and makes it a surreal sort of ballet, one instantly recalls the dance films of Maya Deren. Slightly longer than most of the films here, it is a profoundly evocative film set upon a heathen decadence. Lot in Sodom is one of the few films on the set to retain its original music.
Rhythmus 21 (1921) is the first Avant-Garde offering from Germany, and an interesting inclusion, because german films of the period were generally not associated with any of these movements. The film was directed by Hans Richter and features nothing but shapes, and blocks all animated and punctuated to a musical score. There is no narrative at all, but the formal structure of it certainly fits into many of the artistic trends in Europe of the era, particularly Cubism and Dadaism. Therefore I can't say I was surprised to find that Richter actually came from a painting background, and you guessed it Dada. Richter also made two other Rhytmus films one in 1923, and another in 1925, but since neither are available to me I cannot comment on them at all.
Also from Richter is the better known and more influential Vormittagsspuk (Ghosts Before Breakfast). Again Richter uses animation, but this time he comines it with live action and actual actors. The story might not be a clear one, but there is some general stream of events, contrary to the simple random assortment of shapes and blocks in Rhythmus. Actions repeat and Richter constantly intercuts a moving clock between most shots. Many of the actions are similar to magicians tricks apparently symbolizing the "ghosts" of the film. Like most avant-garde films this would probably benefit from about 12 repeated viewings, but for the first reation I'll just stick with obersvations.