Get tuned up to a variety of common tunings with this online tuner from our friends at GuitarApp. 
If you're a beginner, Standard is the place to be, but as you advance, you can start experimenting with different tunings to see where your creativity will take you!

             Our friends at GuitarApp have provided us with their free metronome to hone your skills.
This is the best way to not only challenge yourself, but to perfect your chord changes, lead playing and so much more.