VArranger - vArranger is a PC arranger software, playing Yamaha, Roland and Ketron styles in realtime !
EarMaster - Professional software for ear training and practical music theory on Windows and Mac.
Real-time Style Performer - The Real-time Style Performer (RSP) gives you the ability to play musical styles created for Yamaha...
GNU Solfege - GNU Solfege is free music education software.
nimbu - nimbu is the arranger, to play characteristic accompaniments. Accompaniments that allow the title to sound and to be recognized without melody. This arranger performs the way music works. In realtime.
LenMus - LenMus is a free program for learning music.