Because the name Joomla (officially with exclamation mark) is protected by a copyright, the usage of the word Joomla in most commercial text should be accompanied by a trademark (TM) sign. This plugin allows you to add a trademark for multiple words to each occurrance of that specific word on your site. Simple but adequate.
The most important parameter of the plugin tells the plugin which words should be accompanied by a trademark-sign. By default it includes the keyword Joomla! which means it will add a trademarkTM to every occurrance of the word Joomla! in regular articles. This parameter can contain a comma-separated list like this:
Besides that, you can choose if only the first occurance of such a word should be marked, or if all occurances should be marked. When marking the word, a TM will be inserted after the word, but optionally you can make this TM also point to a Joomla! article of your choice where you can explain more about the trademarks.