Boxuno

boxUno is a better, faster, unified mail client with offline access. In one inbox, you can send and receive emails, chats, SMS, video chat, Facebook chat, LinkedIn messages, Twitter messages. We are the first fully HTML5 inbox.

Despite being a browser / webmail client, boxUno allows the users to read, modify, and send mails while offline like native installed mail application (e.g. Outlook) because mail is stored locally. boxUno is also optimized for efficiency: the average user checks mail 55% faster using it.