From the developer:
""Check Domains provides fast, easy to use, new and efficient way to find unregistered domains on the web. Check Domains will allow you to scan entire text files or web pages for unregistered domains/words in a meter of seconds. While scanning your documents program displays real time results showing you which domains are available for you to register. Advanced features include: Suggest a Cool Name, filter unwanted words, ignore duplicates, cache results, ping, advanced whois, com net org biz info co.uk support.
""The program will check 3 to 5 domains per second depending on the internet traffic, much faster than conventional trace programs, and all this without taking any of your processor power. Database of 50000 common registered domains is available as a separate download, updated every month.""