Online Tuner by www.howtotuneaguitar.org. This tuner also has alternate guitar tuning options. You can tune to Standard, Drop D, Open C, Open G, Open D, Open G, Half Step Down, Full Step Down, Open E or Admiral. (Note: This tuner requires Flash)
Click here to use this tuner.
Online Guitar Tuner by Fender. This stylish tuner is very handy and has the 12 different styles of tunings available along with the option of looping the tone. You can also strum it with your mouse as you would with a pick. (Note: This tuner requires Flash)
Click here to use this tuner.
Online Chord Tool by www.howtotuneaguitar.org. This tool will find over 1800 chords, simply select the note, then the chord type, and inversion the click the get chord button. There will also be a link for each guitar chord that will lead to even more inversions.
Click here to use the Chord Bot.
Online Chord Tool by www.nubeat.org. By turning the disk (by clicking on the arrows) to another key, you can view the transposed chords. For example if you want a song that is currently in the key of C to be in D, then click on the left arrow 2 times and then you have the correct transposed keys in the inner circle. (Note: This tool requires Flash)
Click here to use the online Chord Wheel.