Guitar Sidekick 

Guitar Sidekick is the all-in-one utility for guitarists! Includes a tablature editor/composer that can display your work in tab and standard notation. Also includes tools for scales, chords, a tuner, metronome, drum machine, and much more!
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Dtab 

DTAB is a powerful, yet easy to use Drum Tab Editor, which includes support for TAB Importing (play drum tabs from the web), MIDI Playback, MIDI export, Custom Midi sound sets, formatted exporting and of course Printing.
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Music MasterWorks 

MIDI music composing software. Allows you to compose music just by singing into your PC microphone. It will also analyze your singing. You can record, edit, playback and print sheet music as well. Compose in either staff or piano roll notation.
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QuickScore Elite Level II 

Comprehensive, integrated software for music composition, incorporating music notation, arranging, MIDI sequencing and recording together in one package.
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QuickScore Elite 

Comprehensive, integrated software for music composition, incorporating music notation, arranging, MIDI sequencing and recording together in one package.
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Happy Note! Tetris 

Music notes are dropping from the treble clef at the top of your screen. Using your keyboard's left and right arrow keys, your objective is to steer each note so it lands on its name at the bottom of the screen.
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