The web hosting industry doesn't need an introduction on Roundcube. Being the most popular open source webmail application, its bundled with almost all shared hosting control panels and many mail provides use its customized versions.
During its initial development time, Roundcube was intended for use in desktops. The people behind Roundcube and Kolab are running a campaign to make Roundcube take advantage of the best web technologies available to provide a better user experience across all devices.
Here is what they aim to do in their own words:
The first thing we're doing is giving Roundcube a modern and gorgeous fluid user interface for the desktop. As a single-page web app with zero page reloads and consistently elegant user feedback, Roundcube Next will be the responsive, reactive and simply gorgeous email application you want to use more than Gmail or Outlook.
Have a look at the campaign and support them at https://www.indiegogo.com/projects/roundcube-next--2
cPanel, Tucows, Fastmail and few others have already pledged a significant amount and the campaign has raised more than 80% by now. 11 more days to do.