Spell checker
You can use web browser ability. Firefox has add-on for example “British English Dictionary” or amount dictionaries for other languages.
However this does not work for me. For example when i'm editing a test cases the javascript FCKEditor get's in the way. I really don't want to use the alternative by configure a spellchecker in the FCKEditor like aspell or SpellerPages.
This enables the web browser ability to do spell checks (as promised in the manual). With the Ctrl key held down you can click the right mouse for the context menu.