Various custom tools make for the Book386 Linux 

- oplplay (plays imf,raw,rad and midi) player (adlib)  
- calc (simple math console calculator)  
- fpu (test FPU 387 chip) 


The most important tool i oplplay since synth support is enabled in the Book386 Linux 

insmod soundcore
insmod sound 
insmod opl3 io=0x388 

You can now play MIDI, RAD and IMF sequence music files ! 
For MIDI pleaae use the GENMIDI.OP2 file to load some nice instruments 

./oplplay -o GENMIDI.OP2 /path/to/file.mid  

For IMF and RAD you dont need to pass it 

./oplplay /path/to/file.rad 
./oplplay /path/to/file.imf