Zimbra provides open source server and client software for messaging and collaboration -- email, shared calendar, and web documents -- is a popular choice for Linux email servers and supports Mac OS X, appliances, and virtualization platfor...
Simple Groupware & CMS is an open source enterprise groupware that offers email, calendaring, contacts, tasks, document management, project management, synchronization with Outlook and cell phones, full-text search, extensions and many more...
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