I would say that QT/Real Alternative are NOT legal judging by the files that are installed. They both install files that are copyrighted and require a license to use by Apple and RealMedia. They seem to be the exact same files as in the retail ($) versions. If the authors of the Alternatives pay a licence fee is anybody's guess. Seems doubtful since the programs are free. As to whether Apple or RealMedia give a hoot? They obviously know about these programs but so far choose not to take legal action.