Capo with open high E-string
A capo put over five strings instead of six can give a guitar sound with resemblance to open tunings. Very nice ringing chords are one of the pleasent things that happen.
In this article, the high open E-string open (the thinnest string) is left open whereas capo is pressing down the rest of strings. The idea can be applied in all possible capo positions, but some will be less thankful. Perhaps the smoothest transition from standard tuning thinking with this approach is with the capo on the fifth fret (see below).
Capo 2 with open high E-string
This capo placement emulates the tuning F#-B-E-A-C#-E. It's especially suited for E major and its relative minor key progressions.
See also chord progressions for this emulated tuning in pdf (seven progressions with diagrams visible for each progression).
Capo 5 with open high E-string
This capo placement emulates the tuning A-D-G-C-E-E. The double E on the highest strings can be utilize in chords such as 024300.
Some other chords that can be used in this configuration in shorted notations (notice that absolute frets are used, i.e. the fret position of the capo is excluded):
See also The Capo Chart ebook with lots of additional chord diagrams and progressions for capo positions with both low and high open E-strings.
Capo 7 with open high E-string
This capo placement emulates the tuning B-E-A-D-F#-E. Playing all strings open results in Dadd9/B.
Some other chords that can be used in this configuration in shorted notations:
F#m9: X 9 7 9 9 0
As mentioned above, more chords can be found in The Capo Chart ebook.
Choose the right capo
For accomplish partial capo positions some capos are better than others. Models which you put on manually are generally better for this purpose. Among the three models seen on images below, the construction of the two first will probably be better.