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.
A safe bet is no more than 7 miles per hour over the posted speed limit. The argument with 7 is that it isn't enough cause to pull you over, nor worth the effort to write the ticket. However, I've gone as many as 10 and not been pulled over, but I knew I was taking my chances.