Freeware vs. Shareware. Freeware is copyrighted computer software which is made available for use free of charge, for an unlimited time. Authors of freeware often want to give something to the community, but also want to retain control of any future development of the software.
Technically, any speed over the speed limit can be considered illegal and ticketable. I've personally witnessed California Highway Patrol pull over one car at 67 mph in a 65 mph zone. (Cop car was in lane two of four on the freeway, at 65 mph.
You CAN drive under the posted speed limit. The posted speed limit is as high as you can go legally. Speed limit to 10mph slower is okay as long as you don't impede traffic. Imnpeding traffic can get you a ticket.