This tool aims to help you to learn the guitar fretboard. You can use it to draw diagrams of scales and chords, using colors to highlight notes or differences among patterns.
See it in action at: http://eliasdorneles.github.com/Fretboard-Studies/
Every diagram is linkable, so you can give the diagram a title and share the link with your friends (or students, maybe). Here are some examples:
If you want to help, or have ideas or suggestions, feel free to drop me an email: eliasdorneles (at) gmail com