Our website provides a free download of MelodyBuilder 6.0.1. The program lies within Multimedia Tools, more precisely Music Production. This software is a product of write-a-hit.com.
From the developer:
Most modern songs have an underlying sequence of chords. Your song starts with the chord A minor, quickly goes to E minor, mixes in a C major chord, etc. Normally you play the notes 'by hand', for each chord individually. The quality of your progression and as a result the quality of your song is limited by your ability to play these chords, and your time to iterate and try different arrangements.
You may want to check out more software, such as Solo Guitar Performance Pieces, Improvisor or Blue Cat's Stereo Chorus - DX, which might be related to MelodyBuilder.