In contrast, her accompaniments show a spicy harmonic language filled with dissonances which illustrate the text, such as in Frissche bloemen.
Other singers who have performed her work include Julie de Stuers, who gave several recitals outside of the Netherlands featuring Dutch composers.
The Utrecht City Orchestra debuted her first major work, the symphonic poem Pêcheurs d’Islande, in 1912.
Throughout the 1920s, Appeldoorn also wrote choral works for the popular community singing evenings in The Hague of the Nederlandse Vereniging voor den Volkszang, conducted by Arnold Spoel.
Symphony no.1 (Meisymfonie) (1915) Symphony no.2 (1916) Noordzee-symfonie (1924) Scherzo (1909) Dance (1912) Pêcheurs d’Islande (1912) Woudsproke (1915) Hollandsche Overture (1917) Adeste, fidelis (1918) Carnaval (1919) Natuursuite (1919) Blijspel-oeverture (1934) Pastorale (1934) Serenade (1936) Frissche bloemen (6 songs) (1909) 2 Hollandsche Liederen (1911) Omhoog (1912) Loflied aan Nederland (1922) Jubileum-lied (1923) De lente luwt (1923) 3 liederen (1925) 6 kantoj (1931) Julianalied (1936) Het Zwerver's Lied (1936) De kalkoen (1938) 2 Hollandse Dansen (1920) Divertissemento (1921) Serenade (1922) Haagssch liedje (1925) Sonatine (1925) 2 Preludes (1932) String Quartet in B flat (1932) Duinsprookje (1927)