Dictionary Cleaner 1.5

Dictionary Cleaner is a free System Preferences pane that adds functionality to your Macs built-in dictionary. Normally when you have spell-check active in an application like Mail or Safari, you can control-click on a highlighted misspelling and ask the Dictionary to learn that spelling (which can be especially useful for nonstandard words that you use often, like the name of a person or company). Dictionary Cleaner improves on this by allowing you to go back and see all the custom words you've added, as well as edit or delete them (and that's especially great if you've ever asked the Dictionary to learn a misspelling on accident). Dictionary Cleaner also has a filter to help you search through your custom words, and it comes with support for ten languages. As befits a humble preference pane, Dictionary Cleaner comes with a very clear, streamlined interface. The only drawback is that Dictionary Cleaner is limited to OS X 10.5 or greater.