MidiNotate Composer
MidiNotate Composer provides an easy way to create or arrange your own music. You can write your own music, or you can start with music downloaded from the internet and then arrange it to suit yourself. No matter where your inspiration comes from, Composer will help you produce great-looking... pitch letters inside of the large notes. ... After creating your music with MidiNotate Composer, let the software provide the accompaniment as you play or sing along, or set up practice loops to perfect your performance.
http://www.notation.com/MidiNotateComposer10TrialSmallSetup.exe - 5Mb - Download - Screenshot

Jam Manager Guitar Software
JAM MANAGER http://www. jammanager. com Maximize your practice times & Jam sessions. No more scrambling for your materials. With Jam Manager software you can see & work with your lyrics, tab, mp3's & a whole lot more all on your screen at one time! You acquire media once (mp3's, midi, lyrics,... Get it perfect by marking a passage of a song to repeat indefinitely so you can practice the part over and over. ... Decipher those speed licks by slowing the rate the music plays back without changing pitch so you can hear each note individually.
http://www.jestechsystems.com/jammanager/download/Jam Manager.exe - 12Mb - Download - Screenshot