Roundcube is #9 in Top 10 Email Clients
Browser-based multilingual IMAP client with an application-like user interface. It provides full functionality you expect from an email client, including MIME support, address book, folder manipulation, message searching and spell checking.
Positions in ratings
#9 in Top 10 Email Clients
Alternatives
The best alternatives to Roundcube are: GMail, Thunderbird, Outlook, Zimbra, iRedMail
See also:
Top 10 Email Clients for Work
Top 10 Email Clients for Work