This guitar tuner allows standard and open* tunings. The program shows the name of the note, together with its place on the stave, and numerical values of pitch/frequency. If the open tunings doesn't fit your needs, you can use the keyboard (in chromatic mode) and choose any other note to tune your guitar.

The open-tunings available are: Standard: E-A-D-G-B-E Standard + 1/2 tone: F-Bb-Eb-Ab-C-F Standard - 1/2 tone: Eb-Ab-Db-Gb-Bb-Eb Standard - 1 tone: D-G-C-F-A-D Standard + D bass: D-A-D-G-B-E Lute: E-A-D-F#-B-D Open G: D-G-D-G-B-D Open D: D-A-D-F#-A-D Open A: E-A-E-A-C#-E Open E: E-B-E-G#-B-E Open C: C-G-C-G-C-E C Alternative: C-G-D-G-A-D