Have you ever found yourself wanting to +1 a web page, but the site hasn’t yet installed the +1 button? I know I have... =] Source
We now have a solution for you: the +1 extension for Chrome! Once you install the extension, you’ll be able to +1 any page you visit on the web!
It doesn’t yet have the ability to share to Google+, but we’ll automatically update it over time after you install it. So be on the lookout for new +1-tastic features in the future.
You can Download this from here