Well, I have an iPhone. Here are a few of my favorite apps. Don't know if they're available for Android, but if so, they're ones that I recommend:
-SoundHound: It'll "listen" to a song for you and tell you the name of the song/artist and
also give you the lyrics
-TuneIn Radio: Lets you listen to radio stations' streams from all over the country/world
-Waze: A pretty good talking/turn-by-turn navigation app
-Fox News
-Reason Magazine's mobile app
-American Thinker's mobile app
-Pulse News: An aggregate that you can customize by selecting your own news & magazine feeds from many different oulets
-Kindle
-Comixology: A comic book reader app if you're into comics
-TapaTalk: A mobile app for accessing online forums, like car forums
-Autoguide: Same as TapaTalk
-Edmunds: Edmunds.com's mobile app
-Inside Line: Edmunds's car news app
-Auto Trader
-Kelly Blue Book
-NADA
-Auto Trader
-eBay Motors
-eBay
-Motor Trend
-Truck Trend
-Car & Driver Buyers Guide
-Auto Blog
-Cars.com
-Popular Mechanics Used Car Guide
-Dynolicious
-Poynt
-Open Table
-PayPal
-Amazon
-Amazon Price Check: Lets you scan an item's barcode in a store and then it finds the item
on Amazon so you can find the best price
-UPS
-FedEx
-USPS Mobile
-GasBuddy: Gas price checker
-Constitution: The entire US Constitution
-ConvertUnits: A great unit conversion app
-RedLaser: A barcode scanning app
-OurGroceries: A grocery list app. Allows multiple users to sync the list on their phones.
-This allows my wife & I to keep track of the same grocery list
-MyFitnessPal: Great app for keeping track of what you eat and how you exercise
-Dog Whistler: I use this app to train/call my dogs
-Angry Birds