1)   Guitar and Drum Trainer 4-RC1
Slow down music to learn at your own pace. Pitch shift music instead of retuning your instrument. Loop music. Filter instruments with vocal removal and 62-band stereo EQ. Save slowed down music. Pitch shift music. Save song settings.

 2)   MusicColor 2.5
You can playback or create animated, ever shifting, with variable density image-based JMP music visualizations, experience the music's stereo effect visually while an image changes its colors. The Web site has free music visualizations and images.