With many of my videos you can see the Auto chord display showing you what chords are being played. To achieve this I used an Ableton Live Max Plugin, and also used software called Synthasia.
These are good however, they are are not able to display complex chords, also invertaions. Recently I discovered some software called ChordieApp. Not only does it display complex chords but it can also displays the guitar fret board and the music score.
See below for the download link
Here is an example video