Douze Fugues pour le Clavecin ou lOrgue [12], op. 1
Douze Preludes et une Fugue pour le Clavicin ou lOrgue [12], op. 3 (pub. 1781)
Fugue in C major, op. 4
Fuga sopra do, re, mi, fa, sol, la for organ, op. 5
Fugen und Praeludien [6] for organ, op. 6
Fugen [6] for organ, op. 11
Praeludia pro Organo, Op. 12 [6?] (pub. 1800)
Preludes [6] for organ or pianoforte, op .13 (Ms. Vienna Nat. Bibl. VII 35481)
Fugue four hands in C major for organ, Op. 15 (pub. 1818)
Fugues [6] for organ or pianoforte, op. 16 (posth. pub. 1809)
Fugen [6] for organ, op. 18
String quartets [6] with Fugues, Op. 20 [the most for violin, two violas, cello]
Three Fugues for organ or pianoforte [Easter fests], Op. 21 (pub. 1802)
Fugues and Fugal compositions from XII neue leichte Praeludien für die Orgel. [...] (pub. 1806)
XII Fugen für die Orgel oder Pianoforte (pub. 1822)
Fuga in g minor for organ (Ms. Vienna Nat. Bibl. S.m. 19236)
Preludes [6] for organ or pianoforte, Op. ? (Ms. Vienna Nat. Bibl. VII 11595)
Versetten [44] for organ
Fugue and/or Fugal compositions for pianoforte from the Clementis Selection [...]
2 Praeludium und Fuge for organ four hands (C major, B flat major)*
* Thanks to Enrico Grangetto.