To name and shame at least one example, such code was included in some versions of the Java Development Kit itself and could be found in easy Google code searches at least at the time Microsoft skipped Windows 9.

Microsoft and Apple and others also prefer to skip 9 for the international marketing reason that 9 is a very evil number by superstition in most of Asia, like how some of the west believes 13 to be unlucky and things like elevators tend to skip 13 in the US/Europe.