JJazzLab - Fed up with boring backing tracks ? Try JJazzLab!
NtEd - Music Score Notation editor.
Band-in-a-Box - Band-in-a-Box is so easy to use!
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Real-time Style Performer - The Real-time Style Performer (RSP) gives you the ability to play musical styles created for Yamaha...
DaCapo Editor - DaCapo Editor is a free Open Source music sheet editor which allows to easily create nice looking partitions. It is available as a web application as well as a desktop application for Windows, MacOS and Linux.