This is an Emacs major mode for text files containing musical chords.
It provides basic syntax highlighting for the (very non-strict) notation used on lyrics/chords/tabs web sites to annotate songs with their structure and chord progressions.
Open a text file, then execute:
M-x music-chord-mode[verse]
C7 (3X)
lalala
G7
lala
[chorus x2]
Written by wouter bolsterlee (wbolster).