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.
The speed limit is just that, the limit or upper speed you may be going for whatever road you are on. Because of the limitations of radar, you will not usually get a ticket for up to about 5 or 6 mph over the posted limit, except in a construction or school zone.