I had received an e-mail recently saying the G-Wizard was going to go to a subscription basis. It sure sounded like you would have to pay every year to continue to use it. I don't mind paying a fair price for a copy, but paying for a license to use it every year sounded a bit excessive to me. It started me on a hunt for a speed/feed/depth calculator to replace it. I found a reference to a freeware program called ME Consultant 2.0 on an old conversation from 2003 on CNC Zone.
I found a copy here:
It seems to work similar to G-wizard except totally free. I noticed there is no accounting for horsepower. In small cutters that's not an issue, but in bigger cutters that could be a problem. I figured take its numbers and stay conservative. G-wizard gives me numbers some times anyway that I know will plug and break a cutter.