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

WWW: http://www.tuxguitar.com.ar/