Only a few things, really, and some of this I know is pretty rare, but if you don't ask, you don't receive, right? :)
1. Sound Blaster Pro MCV CT5330
2. Sound Blaster Pro (original, CT1330/1330A, etc, has 2 FM chips)
3. Roland MPU-401/AT (with the waveboard header)
4. Covox ISA cards (any)
5...