NLnet Labs
Unbound
FreeValidate secure DNS and stub-resolvers with recursive caching.
Windows
Dnssec-Trigger
FreeConfigure your local unbound secure server.
Windows
DNS Analyzer for Linux
FreeAnalyze DNS traffic from tcpdump or libpcap trace files.
LinuxNSD for Linux
FreeGet an open source name server for your Linux system.
LinuxUnbound for Linux
FreeGet a validating recursive caching resolver.
Linux
Unbound Portable
FreeValidate secure DNS and stub-resolvers with recursive caching.
Windows