In Piano Street's archives are the Burgmuller pieces I recommend, and here are those I like from his Opus 100: Nos. 3, 4, 5, 7, 13, 16, 17, 18, 19, 21, and 22.
If you like these, you can go on to some of his more challenging Opus 109 works, especially Nos. 3 (surprisingly challenging to get the tempo, phrasing, and staccato/legato mix right), 7, 9 & 14 (all simple and beautiful), and 11, 12, and 13.
Enjoy!
Bruce