Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.

Websense Email Security - Websense Email Security is a powerful email protection tool that helps you strengthen the security of your network.

Roundcube - Web-based IMAP email client

Abnormal Security - Abnormal is a prominent platform that provides accurate and superior cloud-native Email Security.

Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.

Libraesva Email Security Gateway - Libraesva Email Security Gateway provides enterprise email protection to assist small to large-sized businesses and enterprises to prevent outside attacks on their network.