(open source) The PowerDNS Nameserver is a modern, advanced and high performance authoritative-only nameserver. It is written from scratch and conforms to all relevant DNS standards documents. Furthermore, PowerDNS interfaces with almost any database.    (open source) PowerMail is a redundant and distributed system for receiving and storing electronic mail. Furthermore, incoming email can be forwarded to other email addresses. User information can be read from a database or from disk