Here is a browser add-on, Hhott View, (for Internet Explore and Firefox ) that lets you safely preview links and rich media without clicking or leaving your current page.
You only need to just mouse over the link to preview. Moreover, it also displays safety rating on each link using Google APIs.
HHOTT View's unique features are:
1. Display safety rating on each link to support secure and safe browsing
2. Preview window is a full-featured browser window, not just a small static screen shot
3. Preview window can be placed anywhere within or outside of the web page; in the main monitor or the second monitor
4. Separate preview window for each browser window or browser tab to keep the browsing context and tab browsing friendly
5. Preview links anywhere on the web page including the ones in iframes
I am not claiming that this add-on will give protection against internet threats, but you can use this free tool to preview a link without clicking it. It is quite faster than viewing then on your default browser.