We know you can’t always rely on an internet connection to access your Gmail. With the Gmail Offline app for your Chrome browser, you can search for a message, read it, and compose a reply, all without connecting to the internet!
This app, built by Google and found in the Chrome Web Store, offers a lot of the same features of your normal Gmail interface. You can sort messages by labels and even search using the Gmail search operators.
The best part is definitely the ability to compose a message. For example, if you are waiting for a flight in the airport, you can use your laptop to search your messages and work on a reply to that important email you just received. You can find the app here – link.