For small and medium-sized organizations that need email and collaboration that is easy to use, Kerio MailServer provides a comprehensive and easy to install solution with low administration requirements. Kerio MailServer comes with anti-virus/anti-spam protection, groupware for Outlook, Entourage, smartphones and web mail, automated backup, email archiving, mailing lists and options for Active Directory and Apple Open Directory integration.

AXIGEN Office Edition is a FREE, reliable and secure mail server for home users and small companies. It offers integrated mail services for 5 users, 1 server and runs on Linux, BSD, Solaris. Main features: (E)SMTP, POP3, IMAP4, WebMail(standard & AJAX interfaces), Personal Organizer, groupware, integration with over 15 antivirus/antispam applications, WEB/CLI administration, forum-based technical support during the first year of use.

Web-based knowledge worker automation (KWA) and customer relationship management (CRM) software for contact management, account management, scheduling, goal and outcome management, blogs, file sharing and more. Increase productivity. Full data sharing and synchronization support. SleekOffice features sharing capabilities, allowing you to share information and delegate tasks among team members. Share contacts, calendars, notes and files easily.