tonica fugata!

MuseScore is a free music notation and composition software available for Linux, Windows and Mac.

Rosegarden is a well-rounded audio and MIDI sequencer, score editor, and general-purpose music composition and editing environment.

Sibelius is the world’s best-selling music notation software, trusted by top composers, publishers, and students alike. With Sibelius 7.5, you can express, accelerate, and promote your creativity in more ways than ever before, enabling you to deliver beautiful, professional scores faster and share audio and video versions of your work—with stunningly realistic musical phrasing—to make your talent stand out from the crowd. It’s the fastest, smartest, easiest way to write music for live performance, film and television, media entertainment, or in the classroom. »

GNU LilyPond is a computer program for music engraving. One of LilyPonds major goals is to produce scores that are engraved with traditional layout rules, reflecting the era when scores were engraved by hand. It uses a simple text notation for music input, which LilyPond interprets and processes in a series of stages. In the final stage, music notation is output to PDF (via PostScript) or other graphical formats, such as SVG or PNG. LilyPond also has the facility to generate MIDI files that correspond to the music notation output. »

GNU Denemo is a music notation editor that lets you rapidly enter notation for typesetting via the LilyPond music engraver. You can compose, transcribe, arrange, listen to the music and much more.

Finale is proprietary scorewriting software developed by MakeMusic, Inc. It displays music primarily in music notation and allows for multiple tracks and very specific tweaking of instrument sounds for each track.

Music21 is a Python-based toolkit for computer-aided musicology.Applications of this toolkit include computational musicology, music informations, musical example extraction and generation, music notation editing and scripting, and a wide variety of approaches to composition, both algorithmic and directly specified.

StaffPad is a brand new class of notation app, designed to take advantage of the advanced pen and touch input found on Microsoft Surface* and other compatible Windows 8.1 devices. As you write notation using the pen, StaffPad recognises your handwritten music and converts it into a beautifully typeset score which you can further edit, playback, print and share. StaffPad combines the best of working on paper with the best of working digitally, evolving the same process that's been used for hundreds of years to write countless masterpieces. Natural pen input, detailed orchestral playback and powerful score editing features mean that StaffPad is perfect for professionals, and easy for beginners. For the first time, an entire orchestra is available at the tip of your pen. Getting StaffPad is easy - it's available exclusively on the Windows Store. What will your masterpiece be? »

NtEd is a GTK+ score editor. It intends to be really WYSIWYG: what you see on the screen is exactly what you get on printer output. It supports up to 4 voices per staff, drum notes, 5 lyrics lines, N-Tuplets, context changes, repeats with alternatives, configurable music instruments per staff, MIDI / MusicXML import, PS / PDF / SVG / PNG / Lilypond / MIDI export. Scores can be played through the ALSA sequencer.

Noteflight is an amazing online notation editor. On the free version you get 10+ instruments to choose from, lots of musical symbols and more. On the payed version (Cresendo) you get lots more instruments, guitar tab and sharing options. Best way to wite music on the web.

Canorus is a free cross-platform music score editor. It supports an unlimited number and length of staffs, polyphony, a MIDI playback of notes, chord markings, lyrics, import/export filters to formats like MIDI, MusicXML, ABC Music, MusiXTeX and LilyPond.

MC Musiceditor is free/open source (GPLv2) music notation software (Windows). It has been developed with only one purpose: to make life of musicians easier when making scores. This results in a userfriendly editor which makes professional scores without requiring specific knowledge (other than musical basics)! In short: MC Musiceditor is the easiest way to write, refine, hear and print professional scores.

ScoreCloud, free software that instantly turns your songs into sheet music. As simple as that!

NoteWorthy Composer is a graphical score editor intended for the creation of sheet music, but it can also import and export MIDI and Karaoke files and can export graphical WMFs. The user interface works either from the keyboard or the mouse. Visual results are immediate, and audible results can be heard at any time. Notes can also be entered by playing on a MIDI device, when configured. In version 2, the notes can be heard as they are entered. A feature of the user interface is that notation is displayed during editing. Each staff proceeds linearly from left to right, without being wrapped to the screen. Staff systems are visually broken to fit margins during page layout, allowing many possibilities at "print time", so solo instrument or full conductor can be produced with the same file. Many users prefer this editor layout over the so-called WYSIWYG editors because slowdowns in note entry, as the composition becomes larger, are much less dramatic than in WYSIWYG editors. Print preview is available for adjustments to page layout. »