ChordTransposer

New: Version 1.0.4 can also transpose the standard Chord Diagrams that were created with the extension ChordDiagrams
https://extensions.openoffice.org/de/node/18755
(The default ChordDiagram types beside major are: 5,7,m,m7,m7b5,maj7,sus4,7sus4,dim7)

Transpose Chords and notes of a selected text passage to different key signatures and Capo places. You can use and translate between the following languages:
English: Bb B C C# ...
German: B H C C# ...
German2: B H C Cis ...
Italian: Sib Si Do Do# ...
Scandinavian: Bb H C C#

Chords can be of any kind: Am7b5/C (G7/B) Dsus4 /D /C (/B) A#knife
Notes and chords must start with a capital letter!

If you want to use the music symbols ♯ and ♭ instead of # and b you can tick the checkbox "♯,♭".

Per Default only chords and notes with the Paragraph Style called "chords" will be processed. You can turn that off. But if your text looks like this:

Am C D G7
lyrics lyrics lyrics lyrics
Am C D G7
lyrics lyrics lyrics lyrics

Am C D G7
lyrics lyrics lyrics lyrics
Am C D G7
lyrics lyrics lyrics lyrics

It is a good idea to use a "chords" and a "lyrics" Paragraph Style. The Button "format as "C&L" " can be used to format such kind of text with one click. Just select the whole passage with the mouse and click the button. Starting with the first selected paragraph every odd paragraph will get the "chords" Style, every even paragraph will get the "lyrics" Style. Empty lines will be skipped. 
Format conversions:
Button C&L->F: Convert the format of a selection from lyrics&chords to a format having chords in Textframes that are anchored to characters of the lyrics with paragraph style "lyrics(withChordFrames)."
Button F->C&L: Convert the format from "lyrics(withChordFrames)." to "lyrics&chords"

Button CPro>F: Convert the format from ChordPro to "lyrics(withChordFrames)."
Button F->CPro: Convert the format from "lyrics(withChordFrames)." to ChordPro format.
(Transposing of chords in ChordPro format is not supported)

Button insertF: Add a ChordFrame at textcursor that is filled with the clipboard content and is ready to be filled in by typing over.

Edit the paragraph styles "chords", "lyrics", "chords(inChordFrames)", "lyrics(withChordFrames) as you like.

ChordPro-Formatter:
These buttons help you to format original ChordPro files with directives like {title:},{composer:} etc.
The Button "format (all)" works on the whole document and will convert all line breaks into true paragraph breaks and create paragraph styles for each found directive:
Title, subtitle, artist, composer, lyricist, copyright, album, year, key, time, tempo, duration, capo.
The Button "cleanlyrics (selection)" will delete all [chords] from a selection.

For transposing to the key signature F# first transpose to Gb, then press the "enharmonic switch".

(Depending on the OS and distribution: If the Key and Capo lists are difficult to read because of a too large font you can zoom in/out with the little +/- buttons. (For a permanent change you must edit the Dialog of the macro))

The same extension for LibreOffice4:
https://extensions.libreoffice.org/extensions/chordtransposer

ChordTransposer is part of my free Project for LibreOffice and OpenOffice:
LibreOfficeSongbookArchitect (LOSA)
http://struckkai.blogspot.de/2015/04/libreofficesongbookarchitect.html