This system indexes every work on IMSLP, but is not necessarily specific for instrumentation:

Instrumental (chamber)
Instrumental (other)
Opera
Vocal (non-operatic)
Books

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, ...)

Browse Scores by Instrumentation

Browse Scores by Featured Instrument or Ensemble

Browse Other Custom Categories