Curb - A great free App that allows you to order a taxi to your destination, rate the ride, pay via credit card, and tip all via the App.
Sidecar - This is another great Rideshare app. It's a great way to meet local people and get a ride when needed. All cars are GPS traked and all drivers pass background checks!
Shuddle - Slightly different from the rest, Shuddle is a truly novel service. A truly save way to send your child somewhere when needed or maybe just a safe way to get a ride. All drivers are dubbed caregivers and have been thoroughly vetted.
What service do you use on holiday to travel with?