Greplin allows you to search your emails without having to login to your Gmail. Other than Gmail, it also supports Google Docs, LinkedIn, Facebook, Twitter, Drop box, and many more applications. All you need to do is to link up all your accounts with Greplin and you will be able to search them all in one place.
First Create Account in www.greplin.com
Once you’re in Greplin, click the Add button — it’s the green button with the plus sign in the middle. A list of Web applications and services that Greplin works with will appear.
Click on Gmail Button
