Expanding Communication

Turnkey Solutions for the Enterprise Cloud

Citadel

Is a collaboration suite (messaging and groupware).

Google’s encompassing suite of cloud-based business apps.

KerioConnect is a commercial mail and groupware server.

Kolab Groupware is a secure, scalable, reliable, flexible, full-featured collaboration suite.

Low cost, easy to use Email Server software for virtual, on-premise, or hosted deployments for…

Microsoft Exchange Server is a messaging and collaborative software product developed by Microsoft.

OBM is a free messaging and collaboration platform useful for just a couple to many thousands of users with strong support for mobile devices.

OpenChange aims to provide a portable Open Source implementation of Microsoft Exchange Server and…

Alternative, self-hosted private mail system. End-to-end encryption for messages and attachments.

RainLoop is a web based email client.

Web-based IMAP email client

SOGo is groupware server with a focus on scalability and open standards.

Sanwhole Exchange is a server running iMail, iPress and iStore services.

SquirrelMail is a standards-based webmail package written in PHP.

Zimbra Collaboration is an open, secure collaboration tool for email, calendaring, tasks and more.

EGroupware is free open source groupware software intended for businesses from small to enterprises.

Fast, safe, heavy mail solution.

A fully fledged, free email server solution, an open source project (GPL v2).