Download of checkWhois 1.0 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The most popular version of the program is 1.0. The actual developer of this free software for Mac is Opera widgets.
CheckWhois for Mac lies within System Tools, more precisely Dashboard Widgets. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This program's bundle is identified as com.operasoftware.Widget.checkWhois.
From the developer:
An interesting dashboard widget that helps you search domain name. A domain name is an identification label that defines a realm of administrative autonomy, authority, or control in the Internet. Domain names are hostnames that identify Internet Protocol (IP) resources such as web sites. Domain names are formed by the rules and procedures of the Domain Name System (DNS).
You may want to check out more software for Mac, such as TextTranslator, which might be related to checkWhois.