simple WHOIS client
Download from PortableApps.com
WhoDat Portable can run from a cloud folder, external drive, or local folder without installing into Windows. It's even better with the PortableApps.com Platform for easy installs and automatic updates.
WhoDat is a simple WHOIS utility to look up the registration records for domain names and view the results. The results can be easily copied to the clipboard or saved to a file as well.