NYC Broken Meters (free)
Lists every broken meter in the city. Legally, you can park at one free for an hour.
PrimoSpot Parking ($2.99)
Tells you if a nearby block has less restrictive parking rules.
ParkShark (free)
A community of “parking citizens” posts locations of vacated spots.
I Parked Here ($2.99)
Geo-tags your car’s location and displays a countdown to meter expiration (for Nokia Ovi only).