Hyphenator

http://code.google.com/p/hyphenator/

Hyphenation: [Lingüistica] Acción de unir con un guión

<fieldset>Hyphenator.js brings client-side hyphenation of HTML-Documents on to every browser by inserting soft hyphens using hyphenation patterns and Franklin M. Liangs hyphenation algorithm commonly known from LaTeX and Openoffice.</fieldset>

Lástima que no esté desarrollada la versión para castellano.