SOGo groupware provides webmail, calendar (CalDAV), contacts (CardDAV), tasks and ActiveSync services. Mobile devices (iOS, Android, BlackBerry 10) work well with ActiveSync. Check our documents to setup mobile clients.
Netdata is an awesome, real-time system monitor. If offers unparalleled insights, in real-time, of everything happening on your systems and applications, with stunning, interactive web dashboards and powerful performance and health alarms. Note: netdata doesn't support OpenBSD (yet).