ieSpell - Spell Checker add-on for Internet Explorer:
“ieSpell is a free Internet Explorer browser extension that spell checks text input boxes on a webpage. … The program installs as a new button in the IE toolbar (as well as a new menu item under ‘Tools’) — after filling in a form, just hit the ieSpell button and it pops up a dialog, similar to the MS Word spell check.”
Via Anil Dash.
Comments
The best add-on ever and is the only reason why I have not switched to Firebird full time over IE
http://www.newrecruit.org/archives/2002/october/internet