Star Plus is part of the basic pay service.
Star One hasnt come to Sky yet, and will almost certainly join its sister station in the pay pack. Sony Max is a premium service. The chances of any of them going free is somewhere between nil and remote
You can check the status of any free channels here:
Sony was fta whilst it was ony whilst testing and then as a taster enticing folks to subscribe.. Theres no guarantee it will EVER go fta again, you may get an occasional free period, but basically if you want it, you pay for it.