Topics: Quartets, For 4 flutes, For 4 players

Source: http://imslp.org/wiki/Flute_Quartet_in_A_major_(Briccialdi,_Giulio)

Topics: Nocturnes, For 4 flutes, For 4 players

Source: http://imslp.org/wiki/Notturno_for_4_Flutes_in_D_major_(Dittersdorf,_Carl_Ditters_von)

Topics: Quartets, For 4 flutes, For 4 players

Source: http://imslp.org/wiki/3_Flute_Quartets,_Op.53_(Gabrielski,_Johann_Wilhelm)

Topics: Fantasias, Studies, For 4 flutes, For 4 players

Source: http://imslp.org/wiki/Fantasy-Study_for_4_Flutes_(Scott,_Douglas_Walter)

Topics: Dances, Allemandes, Dances, Basse dances, Dances, Pavans, For 4 instruments, Scores with open...

Source: http://imslp.org/wiki/Danserye_-_Rondes_(Susato,_Tielman)

Topics: Quartets, For 4 horns, Scores featuring the horn, For 4 players, For 4 trombones (arr), For 4...

Source: http://imslp.org/wiki/Quartettino_for_Horns_(Shigeta,_Takuya)

Topics: Pieces, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players,...

Source: http://imslp.org/wiki/In_Nomine_(Thorne,_John)

Topics: For 4 recorders (arr), For 4 players, Scores featuring the recorder, For 4 instruments (arr), For 4...

Source: http://imslp.org/wiki/Batalha_de_sexto_tom_(Anonymous)

Topics: Variations, For 4 viols, For 4 players, Scores featuring the viol, Scores featuring string...

Source: http://imslp.org/wiki/Walsingham_Variations_(Cranford,_William)

Topics: For 4 recorders (arr), For 4 players, Scores featuring the recorder, For 4 viols (arr), For 4...

Source: http://imslp.org/wiki/Tiento_XXIII_de_6°tono_(Correa_de_Arauxo,_Francisco)

Topics: Canzonas, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_XVII_(Maschera,_Florentio)

Topics: Pieces, For treble, 2 tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Carmen_super_O_vos_omnes_(Coclico,_Adrianus_Petit)

Topics: Quartets, For 4 horns, Scores featuring the horn, For 4 players

Source: http://imslp.org/wiki/Quartetto_for_Horns_(Du_Puy,_Edouard)

Topics: Dances, For 4 instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/3_Dances_à_4_(Kusser,_Johann_Sigismund)

Topics: Motets, For treble, 2 tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Carmen_Ave_mater_omnium_(Van_Weerbeke,_Gaspar)

Topics: Pieces, For 4 recorders, Scores featuring the recorder, For 4 players

Source: http://imslp.org/wiki/Consort_breve_(Di_Gregorio,_Ubaldo)

Topics: Canzonas, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_IV_(Maschera,_Florentio)

Topics: Pieces, For 4 violins, Scores featuring the violin, For 4 players

Source: http://imslp.org/wiki/4_Pieces_for_4_Violins,_Op.15_(Schmidt,_Ernst_von)

Topics: Canzonas, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_XVI_(Maschera,_Florentio)

Topics: Ricercars, For treble, 2 tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Ricercar_VIII_del_ottavo_tono_(Padovano,_Annibale)

Topics: Fantasias, For 4 viols, For 4 players, Scores featuring the viol, Scores featuring string ensemble

Source: http://imslp.org/wiki/Fantasias_(Brewer,_Thomas)

Topics: Quartets, Concertantes, For 4 pianos, Scores featuring the piano, For 4 players

Source: http://imslp.org/wiki/Quatuor_concertant_No.2,_Op.816_(Czerny,_Carl)

Topics: Suites, For 3 viols, organ, Scores featuring the viol, Scores featuring the organ, For 4 players

Source: http://imslp.org/wiki/Suite_No.4_for_3_Viols_and_Organ_(Lawes,_William)

Topics: Pieces, For 4 guitars, Scores featuring the guitar, For 4 players

Source: http://imslp.org/wiki/The_Silence_of_Sorrows_(Saboohi,_Ehsan)

Topics: Quartets, For 4 horns, Scores featuring the horn, For 4 players

Source: http://imslp.org/wiki/3_Horn_Quartets_(Javault,_Alexandre)

Topics: Canzonas, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_II_(Maschera,_Florentio)

Topics: Canzonas, For 4 instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_La_Carcana_(Bottaccio,_Paolo)

Topics: Pieces, For 4 trombones, Scores featuring the trombone, For 4 players

Source: http://imslp.org/wiki/Slicky_Slide_Swing_(Nehls,_Ulrich)

Topics: Fanfares, For 4 trumpets, Scores featuring the trumpet, For 4 players

Source: http://imslp.org/wiki/Fanfare_(Fogg,_Eric)

Topics: Allemandes, Dances, For treble, alto, 2 bass instruments, Scores with open instrumentation, For 4...

Source: http://imslp.org/wiki/Allemande_1735_(Metzner,_Ulrich)

Topics: Ricercars, For treble, alto, 2 tenor instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Ricercar_XIII_del_sesto_tono_(Padovano,_Annibale)

Topics: Galliards, Dances, For 4 instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Galliard,_AWV_23_(Andreasyan,_Artem)

Topics: Dances, For 4 instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/3_Dances_à_4_(Anonymous)

Topics: Suites, For 3 viols, organ, Scores featuring the viol, Scores featuring the organ, For 4 players

Source: http://imslp.org/wiki/Suite_No.5_for_3_Viols_and_Organ_(Lawes,_William)

Topics: Pieces, For 4 trombones, Scores featuring the trombone, For 4 players

Source: http://imslp.org/wiki/Bye_Bye_Bones_(Nehls,_Ulrich)

Topics: Quartets, For 4 saxophones, Scores featuring the saxophone, For 4 players

Source: http://imslp.org/wiki/Saxophone_Quartet_(Vaute,_Maurice)

Topics: Fantasias, For 4 viols, For 4 players, Scores featuring the viol, Scores featuring string ensemble

Source: http://imslp.org/wiki/Fantasia_for_4_Viols,_RC_18_(Coperario,_John)

Topics: Pieces, For 4 recorders, Scores featuring the recorder, For 4 players

Source: http://imslp.org/wiki/Lament_for_the_Bird_(St._George_Tucker,_Tui)

Topics: Quartets, For 4 violins, Scores featuring the violin, For 4 players

Source: http://imslp.org/wiki/Violin_Quartet,_Op.98_(Hofmann,_Richard)

Topics: Quartets, Concertantes, For 4 pianos, Scores featuring the piano, For 4 players

Source: http://imslp.org/wiki/Quatuor_concertant_No.1,_Op.230_(Czerny,_Carl)

Topics: Suites, For 4 trumpets, Scores featuring the trumpet, For 4 players

Source: http://imslp.org/wiki/Suite_for_Trumpet_Quartet_(Llamazares,_Pablo_Fernando)

Topics: Pieces, For 3 violins, piano, Scores featuring the violin, Scores featuring the piano, For 4 players

Source: http://imslp.org/wiki/Zigeunermusik,_Op.36_(Mohr,_Hermann)

Topics: Pieces, For 4 recorders, Scores featuring the recorder, For 4 players

Source: http://imslp.org/wiki/Scogliere_per_4_flauti_dolci_(Di_Gregorio,_Ubaldo)

Topics: Fantasias, For 4 viols, For 4 players, Scores featuring the viol, Scores featuring string ensemble

Source: http://imslp.org/wiki/Fantasia_for_4_Viols_(Bull,_John)

Topics: Canzonas, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Canzon_XX_(Maschera,_Florentio)

Topics: Pieces, For 4 shamisens, Scores featuring the shamisen, For 4 players

Source: http://imslp.org/wiki/4_Shamiseny_(Żołnowski,_Maciej)

Topics: Dances, For treble, alto, tenor, bass instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/Il_Primo_Libro_de_Balli_(Mainerio,_Giorgio)

Topics: Fanfares, For 4 trumpets, Scores featuring the trumpet, For 4 players

Source: http://imslp.org/wiki/Fanfare_for_4_Trumpets_(Tamura,_Masahiro)

Topics: Pieces, For 4 double basses, Scores featuring the double bass, For 4 players

Source: http://imslp.org/wiki/Fjord_(Hastings,_John_P.)

Topics: Dances, For 4 instruments, Scores with open instrumentation, For 4 players

Source: http://imslp.org/wiki/4_German_Dances_(Demantius,_Christoph)