What are some alternatives?
When comparing MuseScore and Sibelius, you can also consider the following products
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.
LilyPond - GNU LilyPond is a computer program for music engraving.
TuxGuitar - A Multitrack tablature editor and player.
Rosegarden - Rosegarden is a powerful audio, MIDI and score editing and sequencing environment for musicians.
OpenMPT - OpenMPT is a popular tracker software for Windows.