The answer is Tuxguitar.
With TuxGuitar, you will be able to compose music using the following features
- Tablature editor
- Score Viewer
- Multitrack display
- Autoscroll while playing
- Note duration management
- Various effects (bend, slide, vibrato, hammer-on/pull-off)
- Support for triplets (5,6,7,9,10,11,12)
- Repeat open and close
- Time signature management
- Tempo management
- Imports and exports gp3,gp4 and gp5 files
When I installed the Tuxguitar, there's a soundbank error. The solution is already on the website:
Other than Tuxguitar, I'd like to introduce another useful software Gtick. This is not only for guitarist.
Gtick supports different meters (Even, 2/4, 3/4, 4/4 and more) and speeds ranging from 10 to 1000 bpm. It's really useful for beginner musicians.