Half of getting somewhere is knowing where you're going. To that end, travel software can be very useful for frequent road trippers, geography buffs or world travelers. Though nothing beats the experience of discovering you're holding that map upside down while 100 miles between Carlsbad and El Paso, having map software ready on your laptop, PDA or other handheld device can be incredibly handy. Whether you need a map, international atlas or just travel trips, there are plenty of computer programs that can deliver the information you need.