This is a list of Internet Explorer extensions, software add-ons designed for Internet Explorer web browsers.
- Turn Off the Lights, a lamp button inside the browser to bring focus to the video element.
- Alexa Toolbar, includes a popup blocker, a search engine entry box, related links and information about the Alexa ranking of the current website; Alexa uses it to measure website statistics.
- DealPly, shows price comparisons from other retailers while a user is browsing.
- Fiddler, a HTTP debugging proxy
- IE7pro, aims to enhance the Internet Explorer feature set
- Internet Explorer Developer Toolbar aims to aid in design and debugging of web pages. It allows validating of CSS and HTML. It allows the viewing of the page's source as well as of the DOM source and the CSS selectors that were applied to an element.
- Vivisimo MiniBar offers search and pop-up blocking 
- Altavista toolbar offers search, translations, and pop-up blocker 
- SpoofStick aids defending from phishing 
- Earthlink toolbar offers search, phishing defense, and pop-up blocker
- Zemanta offers suggestions like images and links when writing blogs on popular platforms such as WordPress.com, TypePad, LiveJournal and similar 
- LuckyTabSave allows saving an Internet Explorer's tabbed browsing session into a file and open it later.