What are some alternatives?
When comparing Impro-Visor and TuxGuitar, you can also consider the following products
MuseScore - 24 Sep 2012 . Design a homepage that captures attention and serves as a good starting point for navigating the website.
Guitar Pro 7 - Create, play and share your tabs
Sibelius - Sibelius is a virtual score creation tool which allows composers to easily create new piano scores, developed by Avid.
Band-in-a-Box - Band-in-a-Box is so easy to use!
Rosegarden - Rosegarden is a powerful audio, MIDI and score editing and sequencing environment for musicians.
OpenMPT - OpenMPT is a popular tracker software for Windows.