rlisle

This plugin assists in the creation of staffless lead sheets, also called chords sheets. 
It defines a [chordsandlyrics] shortcode which can be used in your post or page text. 
It does not require any editing of your template files.
Text appearing between the [chordsandlyrics] and [/chordsandlyrics] tags will be 
formatted for chord symbols written in square brackets (eg. [Cmaj]) embedded 
inline within lyrics. 
It will then display the chord symbol at the same horizontal position above the lyrics. 
For example:
[C]Oh [F]say can you see…
will be reformatting using HTML table to display as
C F 
 Oh say can you see…
with the C correctly positioned over “Oh” and the F positioned over “say”. 
The commonly used alternative is to use fixed fonts which isn’t very attractive. 
This syntax is similar to the that used by ChordPro/Chordii.
Features:
<ul>
<li>Format lead sheets, keeping chord symbols above the correct lyric.</li>
<li>Appearance options page allows each end user to select Lyrics only 
or Chords And Lyrics display via their profile (user’s option page).</li>
</ul>
<h3>Directions for Use</h3>
<ol>
<li>Create Posts or Pages containing the [chordsandlyrics] … [/chordsandlyrics] tags.</li>
<li>Embed chord symbols within square brackets inline with lyrics within these tags. 
For example: 
 [chordsandlyrics] 
 [C]Mary had a little lamb, [G]little lamb, [C]little lamb. 
 [C]Mary had a little lamb whose [F]fleece was [G]white as [C]snow. 
 [/chordsandlyrics] 
Note that chords can appear in the middle of lyric words.</li>
</ol>

Chords and Lyrics

ChordsAndLyrics will format staffless lead sheets.

intelligentDesign

Easily add chords and lyrics to any WordPress website using shortcodes! Users can print just the content you choose (the lyrics and chords) instead of a bunch of useless HTML. Admins can choose multiple layout options and the premium version has a ton more features like transposing to any key and unlimited colors.
This includes a widget for displaying the control buttons vertically or horizontally.

Keymaster Chord Notation Free

Easily add chords and lyrics to any WordPress website using shortcodes!  Users can print just the content you choose (the lyrics and chords).

Chords and Lyrics vs Keymaster Chord Notation Free