MEFA is described as 'program that can be used for writing, printing and playing music. The MEFA program is very easy to use and the music can be written in a fast way. The notation is presented above the text window' and is a Music Production App in the Audio & Music category. There are more than 25 alternatives to MEFA for a variety of platforms, including Windows, Mac, Linux, iPad and BSD. The best alternative is MuseScore, which is both free and Open Source. Other great apps like MEFA are TuxGuitar (Free, Open Source), Guitar Pro (Paid), OpenMPT (Free, Open Source) and Rosegarden (Free, Open Source).
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.
Aria Maestosa is an open-source (GPL) midi tracker/editor. It lets you compose, edit and play midi files with a few clicks in a user-friendly interface offering keyboard, guitar, drum and controller views.
Band-in-a-Box is an intelligent automatic accompaniment program. You can hear and play along to many song ideas and go from "nothing" to "something" in a very short period of time with Band-in-a-Box as your "on demand" backup band.
alphaTab is a cross platform music notation and guitar tablature rendering library. You can use alphaTab within your own website or application to load music sheets from files like Guitar Pro or use the built in markup named alphaTex.
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.