It does a number of very useful things to Internet Explorer 7.0:

1. Enhanced IE’s Tabbed Browsing
Too numerous to mention.
2. “Super drag & drop”
Open new links by dragging and dropping them on the page.
3. Mouse gesture support
Execute common tasks by drawing simple objects on the screen with your mouse.
4. Crash recovery
Automatically restored opened pages after a crash occurs.
5. Save web page to image
Save any URL to an image of the format of your choice.
6. Quick Proxy Switcher
Quickly change the proxy settings without going all the way into Options.
7. Ad Blocker
Block out those Flash ads, including fly-ins, slide-ins, etc.
8. User Script
Script/orchestrate common user actions within IE7.
9. Inline search
Automatically find stuff
10. Spell check
Provides a “red underline” on text that you enter that’s misspelled.

Here’s an interesting free plug in for IE 7.0 called IE7Pro: http://www.ie7pro.com/

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