I have been using the HostNed RainLoop for email (webmail) lately. Although it is a little limited in it's features, I have to say it is a nice email experience for something that is browser-based. Looks way better than the other standard webmail systems like Roundcube and Horde -- especially when on a tablet or smartphone.
It's still in Beta, but give it a try.
https://apps.hostned.com/rainloop/