Browse by genre
Free public domain sheet music from IMSLP / Petrucci Music Library
Browse scores by genre or instrument
Browse by indexed genre
This system indexes every work on IMSLP, but is not necessarily specific for instrumentation:
Instrumental (chamber)
Instrumental (other)
Opera
Vocal (non-operatic)
Books
Browse manual instrumentation lists
These lists are manually compiled, and do not necessarily list the complete IMSLP collection. They are, however, more specific than the indexed genre (e.g. clarinet, piano trio, ...)
