Have a Garmin or TomTom GPS? PIG Tones (”Politically Incorrect GPS”) has some very funny voices you can download to your device at a small fee. They even provide a small program that installs it onto your device automatically. Their TomTom installations are apparently a bit easier than Garmin, but I own a Garmin and it was pretty easy for me (plus, Pig Tones is a Garmin authorized partner). They also have a lot of POI (Points Of Interest) Maps. Personally, I downloaded the Stewie, Yoda, Gollum, and Drill Sergeant voices and they are hillarious!