A plugin that gives you the option to format your items using Texy format. The plugin has its own page. Visit: http://texy.info
What is Texy? It allows you to enter content using an easy to read Texy syntax which is filtered into structurally valid XHTML. No knowledge of HTML is required. Texy is one of the most complex formatting tools. It allows adding of images, links, nested lists, tables and has full support for CSS, hyphenation of long words, clickable emails and URL (emails are obfuscated against spambots), national typographic single and double quotation marks, nonbreakable spaces and many others.
This page still needs more info about the plugin. Feel free to help improving it or if you have any doubts, try this forum thread: http://forum.nucleuscms.org/viewtopic.php?t=9336