Open Source Music Composition Software

MuseScore is a free and open-source music notation software designed for composers, arrangers, educators, and musicians of all levels. It allows users to write, edit, and print professional-quality sheet music with no limitations or subscription fees. MuseScore Studio supports a wide range of instruments and ensembles, from solo piano and guitar to full orchestras and choirs. The software is easy to learn while still offering powerful tools for advanced notation and score layout. With support for MIDI input and formats like MusicXML and MIDI, MuseScore integrates smoothly with other music software and workflows. Built by a global open-source community, MuseScore continues to evolve through active development and community contributions. Support MuseScore at http://musescore.org/en/donate

LMMS is a free cross-platform software which allows you to produce music with your computer. This covers creating melodies and beats, synthesizing and mixing sounds and arranging samples. You can have fun with your MIDI keyboard and much more – all in a user-friendly and modern interface. Furthermore LMMS comes with many ready-to-use instrument and effect plugins, presets and samples.

Very Powerfull Crossplatform [Advanced] Music Note Editor [STILL PLANING,DONT DOWNLOAD IT] Qt based project Strong plugin system that can dynamicly connect to all types of application using specified drivers,even JS plugins. Strong editor host provided and shared with all plugins. Allow to import or export files and sounds to all type of music files using dynamic plugins,basically added GuitarPro,... Allow users to use multiple output and input devices such as Internal MIDI System,ISDB Instrument Sound Database,DirectX MIDI IO,... Provides a powerfull API for plugins and other devices to use. Includes over 50 usefull internal plugin. Internal amplifier known as RoNOTE/Amplifier project that can import to other applications. RoNOTE has its special proccess models that speedup the application very much. Thanks...