Most Linux users don't write their own software or filters. Simply because some other kind person took the time to do it themselves, and then put it in the package repositories for everyone to use. That's the joy of free software--someone's probably already made something to do that task. And dare I note that Linux creators can't make big bucks like Microsoft, because Linux is free. No. You don't see them on shelves because they're all free. Ubuntu, for example, has more than 16,000 free software packages available in its repositories. See also: Firefox, OpenOffice, The GIMP, etc. WINE. WINE. (Which, ironically, stands for WINE Is Not an Emulator). FUD is fun!