Xuheki is a fully featured email (IMAP) client for
the Web. It looks and feels like an application
rather than a Web site. It is fast, clean, and
features no page reloads. It supports multiple
users per installment, multiple IMAP servers per
user, and multiple folders per IMAP server. It
also supports text or HTML email, attachments,
inline images, printing, and more. It has an
"AJAX" interface that could compete with
desktop-based mail user agents.