BIND - BIND is by far the most widely used DNS software on the Internet.
Symantec Data Loss Prevention - Fully protect your data with the comprehensive detection technologies and unified policies of Symantec's industry leading Data Loss Prevention (DLP).
Knot DNS - High-performance authoritative-only DNS server
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.
PowerDNS - PowerDNS offers open source DNS software, services, and support.
Paubox - Paubox provides HIPAA compliant email encryption without the hassle of extra steps.