What are some alternatives?
When comparing MuseScore and OpenMPT, you can also consider the following products
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Guitar Pro 7 - Create, play and share your tabs
Finale - Finale, the world standard for music notation software, lets you compose, arrange, notate, and print engraver-quality sheet music.
MilkyTracker - MilkyTracker is an open source, multi-platform music application for creating .MOD and .
LilyPond - GNU LilyPond is a computer program for music engraving.
Renoise - Renoise is a digital audio workstation.