Here's a complete list of alternate tunings, or at least I believe that its pretty complete. Regardless, there are quite a few tunings for guitar on this list. The very last one is a tuning that I came up with years ago, so I thought that I would go ahead and include it.
As I discover more tunings for the guitar (there are tons!!!) I will add them to this list, or if anyone knows of something that I missed and cares to share it, I will most certainly include it on this list - enjoy.
Open A
- E - A - C#- E - A -E
- C - G - C - G - C - E
- D - A - D - F# - A - D
- D - A - D - F -A - D
- D - A - D - G - A - D
- D - G - D - G - B - D
- D - G - D - G - A# - D
- D - G - D - G - C - D
- C - D# - F# - A - C - D#
- C - E - G# - C - E - G#
- E - A - D - G - C - F
- C - F# - C - F# - C - F#
- C - G# - E - C - G# - E
- C - A - F# - D# - C - A
COMMON ROCK TUNINGS
Drop D
- D - A - D - G - B - E
- D - A - D - G - B - D
- C - G - C - F - A - D
- B - F# - B - E - G# - C#
- A - D - G - C - E - A
- B - E - A - D - F# - B
- C - F - Bb - Eb - G - C
- D - G - C - F - A - D
- Db - Gb - Cb - Fb - Ab - Db
- E - A - D - G - B - E
- Eb - Ab - Db - Gb - Bb - Eb
F# Tuning (To be used with 8 string guitars)
- F# - B - E - A - D - G - B - E
- A - A - A - G - B - E