Mozart composed many works for a smaller chamber ensemble.
I have adapted, or arranged many of them for wind ensembles of different sizes.
Divertimenti
Divertimento No. 1 in E♭ major, K. 113 (1771)
Divertimento No. 2 in D major, K. 131 (1772) (UNUSUAL 4 Horns! flute, oboe, bassoon, strings) arranged mvt.1 only symphonic winds (dectet + 2) complete arrangement
Divertimento for string quartet or string orchestra in D major, K. 136/125a ("Salzburg Symphony No. 1") (1772) arranged wind quintet
Divertimento for string quartet or string orchestra in B♭ major, K. 137/125b ("Salzburg Symphony No. 2") (1772) arranged wind quartet
Divertimento for string quartet or string orchestra in F major, K. 138/125c ("Salzburg Symphony No. 3") (1772) arranged wind quintet
Divertimento No. 3 for unusual wind dectet (pairs of oboe, cor anglais, clarinet, horn and bassoon) in E♭ major, K. 166/159d (1773) arranged standard wind dectet
Divertimento No. 4 for unusual wind dectet (as above) in B♭ major, K. 186/159b (1773)
Divertimento No. 5 for winds (flutes, trumpets, timpani)in C major, K. 187 (Anh. C 17.12) (1773) (spurious, by Leopold Mozart)
Divertimento No. 6 for winds (as above K187) in C major, K. 188/240b (1773)
Divertimento No. 7 in D major, K. 205/167A (1773)
Divertimento No. 8 for a wind sextet (pairs of oboes, horns and bassoons) in F major, K. 213 (1775) - arranged wind quintet
Divertimento No. 9 for wind sextet in B♭ major, K. 240 (1776)
Divertimento No. 10 in F major, K. 247, "Lodron No. 1" ("Lodronische Nachtmusik") (1776)
Divertimento No. 11 in D major, K. 251 (1776)
Divertimento No. 12 for wind sextet in E♭ major, K. 252/240a (1776) arranged wind quintet
Divertimento No. 13 for wind sextet in F major, K. 253 (1776)
Divertimento for piano, violin and violoncello in B♭ major, K. 254 ("Piano Trio No. 1") (1776)
Divertimento No. 14 for winds in B♭ major, K. 270 (1777) arranged wind quintet
Divertimento No. 15 for horns and strings in B♭ major K. 287/271h "Lodron No. 2" ("Lodronische Nachtmusik") (1777)
Divertimento No. 16 for winds in E♭ major, K. 289/271g (1777) (doubtful)
Divertimento No. 17 in D major, K. 334/320b (1779–80)
Five Divertimentos (25 pieces) for three basset horns in B♭ major, K. 439b (Anh. 229) (1783): arrangements for different ensembles
Also, 6 Viennese Sonatinas (not by Mozart), but arranged for piano, after his death, using movements from the 5 Divertimenti - arranged wind quintet.
Divertimento for two horns and strings in F major, "A Musical Joke" ("Ein musikalischer Spaß"), K. 522 (1785–87?) arranged wind dectet
Divertimento for string trio in E♭ major, K. 563 (1788)
Serenades:
Cassation in D major, K.100/62a "Serenade No.1"
4 Country Dances, K.101/250a "Serenade No.2"
No.1 Gavotte arranged wind quintet
Complete arranged wind quintet
Serenade No.3 in D major, K.185/167a "Antretter"
Serenade No.4 in D major, K.203/189b "Colloredo"
Serenade No.5 in D major, K.204/213a
Serenade No.6 in D major, K.239 "Serenata notturna"
Serenade No.7 in D major, K.250/248b "Haffner"
Serenade No.9 in D major, K.320 "Posthorn"
Serenade No.10 in B-flat major, K.361/370a "Gran Partita" written for 13 instruments: 12 winds and bass
arranged wind dectet
Serenade No.11 in E-flat major, K.375 wriiten for wind sextet, later arranged by Mozart for wind octet: arranged wind dectet
Serenade No.12 in C minor, K.388/384a "Nacht Musique" written for wind octet arranged wind quintet, wind dectet
Serenade No.13 in G K.525 "Eine kleine Nachtmusik" written for strings
arranged wind quintet/wind dectet