based on D

Tuning 6 5 4 3 2 1
Open D D A D F# A D John Fahey- Poor Boy
D Wahine D A D F# B D also called D6
D Minor D A D F A D also called cross-note - fahey Red Pony (Wine and Roses)
Dm (C bass) C A D F A D
D Modal D A D F# A B
D Modal D A D G A D also called D suspended - faheys cuckcoo
D Modal C G D G B E also called Cmaj7/9 / also called C Wahine / looks like standard with the 2 low strings tuned down a step / (4 R 5 R 3 6 or R 5 2 5 7 3)Chet Atkins, "Just As I Am"
D Modal D A C G A D like DADGAD w/4th string tuned down to C
D D A D F# A E open D tuning w/ 1st string tuned up to E
D D A D F# A C# DMaj 7 ??
D A D G A E
D A D A A D also called Raga (below)
D A D E B C#
D G D E A D
open D D A D A D F# open C (cgcgce) tuned up a whole step
open Dm D A D A D F this looks like open Dm. It is almost like open CGCGCE up a step but with a minor 3rd on the hi string
D6/9 D A d f# b e
D7 D A D A C D
D7? D A C F# A D
D7 C A D F# A D
D7 D A D F# C D
OPEN D7 D A D F# A C
D7 D A D F C D isn't this really Dm7?
D7sus4 D G C G C D Led Zeppelin The Rain Song
Canadian tuning D A E F# A D D tuning with the D (4th) string tuned up a whole tone to E. / can also be used a semitone or a tone lower
Raga D A D A A D almost like open D with F# tuned up to A to match 2nd string- sort of drones / Play melodiies on a single string (highest or second highest) for a modal feel with a full rich pedal drone. Try some eastern scales for a pseudo sitar. Play what would normally be a "D major" for a complex yet ambiguous 9nth chord. (there's no third, just 6th, 7th and 2nd.)
D A D F# G D open D tuning variation. Whitley uses it tuned with all strings tuned down 1/2 step for Loco Girl (below) this looks more manageable
Dsus4 D A D G A F#
modified D D A D G A B
Slow Motion D G D F C D
Layover D A C G C E
D A D F# B E
D A D G C E
D6Add9 D A E A B E cgdgad tuned up one step
D Major 9 D A D A C# E
Dmaj7 D A D F A C
open D variationE A D A D G# (can also lower 6th string to D ie: D A D A D G#)