Check out Jacuba – it’s a web service that allows you to activate a spell checker inside any form element in your browser. Simply drag their bookmarklet to your browser’s link bar, or bookmark it. Then when you’re filling in a form online, toggle it and viola, you have an instant interactive spell checker – right click on any word Jacuba flags as possibly mis-spelled and you’ll be offered a set of alternatives. This can come in very handy. Folks will laugh but I can’t tell you how many times I’ve pasted a word into ecto to make sure I’m spelling it correctly. The tradeoff is that since it’s a web service it can get a little laggy as you type and it passes your data back to their servers to check the spelling. It also doesn’t seem to work universally – I couldn’t coax it into working for my yahoo or gmail accounts for example, meanwhile it worked fine with ebay and my speedymail account. Still, it’s free and no registration required, so it costs you nothing but a few moments to check out and test with whatever services you might need a spell checker.