DefleMask - An old-school game music tracker for an ample variety of systems.

Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.

GoatTracker - This is a crossplatform C64 music editor.

MuseScore.org - Create, play back and print beautiful sheet music with free and easy to use music notation software MuseScore. For Windows, Mac and Linux.

MilkyTracker - MilkyTracker is an open source, multi-platform music application for creating .MOD and .

Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.