1) Eavesdropper 2) Snoop 3) Spyer 1) Juicy-tidbit seeker 2) Nosy parker 3) Prying one 4) Snoop 5) Spy, often 6) Unduly curious one 
[Global Positioning System] Snooper is a UK brand of GPS navigation systems and speed camera detector systems for cars, HGV vehicles and caravans. Snooper is owned by satellite navigation systems manufacturer Performance Products Ltd. based in Runcorn, Cheshire, North-west United Kingdom. Performance Products is a wholly owned subsidiary of...