Sanebox - SaneBox is a cloud-based service that allows users to filter and manage their emails.
Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Covideo - Covideo is a Video Email Platform for Businesses that enables companies to communicate quickly and effectively with their customers.
Roundcube - Web-based IMAP email client
SpamTitan - Comprehensive Email Protection. 99.99% Spam Detection. Blocks phishing, viruses, malware and other email threats.
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.