Internet Explorer 9

Here are some great features of IE9 which make it different from other browsers:
Pin sites to the taskbar

You can access websites that you visit regularly by pinning them to the taskbar on your Windows 7 desktop.

Search in the Address bar

You can now search directly from the Address bar. If you enter a website's address, you'll go directly to the website. If you enter a search term or incomplete address, you'll launch a search using the currently selected search engine. Click the address bar to select your search engine from the listed icons or to add new ones.

Use Download Manager

Download Manager keeps a list of the files you download and notifies you when a file might be malware (malicious software). It also lets you pause and restart a download, and shows you where to find downloaded files on your computer.

Work with tabs

You can open a tab by clicking the New Tab button to the right of the most recently opened tab. Use tabbed browsing to open many webpages in a single window. To look at two tabbed pages at the same time, click a tab, and then drag it out of the Internet Explorer window to open the tab's webpage in a new window.

Protect your information while you browse

To protect the security and privacy of your information while you browse, Internet Explorer 9 has introduced Tracking Protection and ActiveX Filtering.

Information that doesn't slow you down

The new Notification bar that appears at the bottom of Internet Explorer gives you important status information when you need it, but it won't force you to click a series of messages to continue browsing.

More Details here

Download IE9

More:

1.   Preparing Your Site for IE9

2.   Microsoft: IE9's web privacy hole? A feature, not a bug

3.   IE9 Introduces New Security Features

4.   IE9: 5 Features and Drawbacks

5.   10 Great Features That Makes Internet Explorer 9 An Awesome Browser