Enter a word or phrase and this page will try swapping letters, dropping letters, duplicating letters and substituting common typos (such as adjacent keyboard letters)
The domain name typo tool will drop letters, swap letters, duplicating letters and substitute letters for their adjacent keys on the keyboard. Occasionally, this will come up with a good available domain name, but is generally better for catching visitors who typed in another name wrong.
As an example, try entering the phrase 'google' into this tool. With the number of visitors that google get, just a tiny percentage of their visitors would mean massive visitor numbers. If you right click on any of the results and select whois, you'll see that google knew this and have registered many of the combinations.