Spelling Bee is a useful standalone tool for people who like to use big words. Just type in a word, and if it's not a word in the dictionary, it will make some suggestions. Click on the "..." or press the up/down arrow keys to see more suggestions. It features auto-copy, auto-checking, and two different visual styles. You can use Spelling Bee with many different languages.
To add languages other than English, first download a dictionary file from ftp://ftp.gnu.org/gnu/aspell/dict/ (Note that you should only download files beginning with aspell or aspell5 - aspell6 files probably will not work). Then drag the tar.bz2 file onto the Widget. The bee will let you know when it's done installing the new dictionary. Then, activate it by right-clicking the Widget, and choosing "Manage Dictionaries." Finally, right-click and select the dictionary. Spelling Bee also lets you customize the colors and size. This version is the first release on CNET Download.com.