Утилита для DNS сёрфинга - ищем сервера имен в Сети, и ряд иных интересных возможностей - оптимизация доступа к сайтам путем манипуляция с DNS, а также возможность поддерживать собственную доменную запись.

Thanks to DNS servers we surf the Internet using names such as "www.simpledns.com" instead of impossible to remember IP addresses.
DNS servers translate these domain names into machine readable IP-addresses needed to locate the requested web-server on the Internet.
With Simple DNS Plus you can host your own domain names, or simply speed up Internet access by running your own DNS server.
Simple DNS Plus can easily be integrated with your web-site for ISP customer signup etc., or even a full web-based DNS solution.
Simple DNS Plus is also a DHCP server, it comes with a DNS Look Up tool
General Features
Host your own domain names on your own Internet DNS Server
If your computer already has a fixed IP-address - for example if you have a cable modem, DSL or another permanent Internet connection - you may already be hosting a web-site on it. Why not also host DNS yourself for maximum control, including creating sub-domains etc. ?
Speed up Internet access with DNS caching
Even if you don't have your own domain name, Simple DNS Plus will speed up Internet access by caching all DNS records requested by your computer (or local network of computers), and fetching them again later much faster.
Bypass your ISP's DNS servers
Simple DNS Plus pre-loads the Internet root DNS server records at startup.
This makes it possible to completely bypass your ISP's DNS servers which in many cases may be slow.
Name the computers on your LAN and forget IP addresses and hosts files
Tired of maintaining lists of IP addresses or manually updating and copying hosts files on your local network ?
With Simple DNS Plus, you can name your e-mail-server "mail", your proxy-server "proxy", your Intranet web-server "web", etc. Then use these easy to remember names instead of IP addresses when setting up your client PCs' Internet programs, and you never have to edit a hosts file again.
Direct support for dynamic IP clients
Simple DNS Plus supports TSIG authenticated dynamic DNS updates.
This update method is much more efficient than the HTTP based and other proprietary update methods typically used because it happens directly via the DNS protocol.
Several dynamic IP updater applications can be used with this.
Setup tutorials are provided for DynSite and DirectUpdate.
Integrated DHCP server auto configures network computers and DNS
IP-addresses and other TCP/IP options can automatically be assigned to your network computers through DHCP.
Client computers configured through DHCP are automatically registered as DNS records, so the rest of the network can easily locate them.
There simply is no easier way to configure a DNS server - or TCP/IP settings on your network computers!
Simple DNS Plus also has a unique feature fixing the "unkown DHCP client" problem often encountered with older Apple/Mac DHCP clients.
See DHCP in the help file for details.