1)   DNS Thing 1.0
DNS Thing is a free tool that lets Windows users perform DNS queries from a graphical interface. It provides commonly looked up information such as IP addresses for hostnames or MX records for domains.

 2)   SkDNS ActiveX Control 4.0
SkDNS ActiveX Control is a DNS (Domain Name Service) ActiveX control that can be used for network diagnosing, troubleshooting, and monitoring. It allows developers to integrate the DNS protocol message sending capability into their applications.