As a free Internet Explorer browser extension, isSpell checks text input boxes on a webpage. Even if your web application already includes spell checking functionality, you might still want to install this utility because it is definitely much faster than a server-side solution.

The plugin has the following features:

• Completely standalone spell checker for your web browser.  
• Integrates flawlessly with Internet Explorer and other IE based browsers.  
• Three ways to start the spell check; via the right click context menu, the toolbar or the menu bar. 
• Supports a wide range of web applications including simple text forms, rich text editors, forums, blogs, webmail and more. 
• Intelligent suggesting for misspelled words using typographic “looks like” matching.
• Powerful API for web application developers.