I've basic queries that many demo version softwares are available online for few days validity. can the analysed data from that version of software are acceptable for any journal by acknowledgement.
A very interesting query. My initial reaction would be that, since these companies provide free trial versions of their software, I do not think you are technically behaving in an unethical manner by utilizing this "free" option. If the trial version of the software in question is equipped to handle your analyses, and you disclose in your manuscript that study data were analyzed with a trial version of software, I do not see why a journal would have any qualms. On the other hand, if you were to somehow continually use free trial versions of the various statistical software packages (as I know some have tried to do), this would most certainly be unethical. The introduction of the open source R package has likely curtailed this practice though.