You perform many tasks perform in your browser that you once did with a word processor or other application that has a spell checker. You might use a Web-based e-mail service such as Gmail, for example. You may write a blog. And you most certainly fill out forms. That means there are plenty of chances to make yourself look foolish by spelling words incorrectly. Incorrect spelling isn't merely embarrassing; if you're filling out a job application or sending a cover letter, for instance, it could have serious consequences.
Alas, most browsers generally don't include built-in spell checkers. IESpell solves the problem for Internet Explorer users. It integrates right into the browser, and makes it a snap to spell-check anything inside the browser. It includes all the features you'd expect in a spell checker, including the ability to add words to a dictionary, and to ignore certain words.
Note: This link takes you to the vendor's site, where you can download the latest version of the software.