Google Authenticator (iPhone) works with two-step verification for your Google Apps account to provide an additional layer of security when signing in. Use Google Authenticator to generate verification codes directly on your mobile phone, without the need for a network connection
Google Goggles (Android) - Goggles uses image recognition technology to recognize objects and return relevant search results. Identifies products, famous landmarks, storefronts, artwork, and popular images found online. Goggles can translate words in English, French, Italian, German, Spanish, Portuguese & Russian
Google+ (Android) is still in active development and not yet available to everyone. You need an invitation to sign in.
Google+ for mobile makes sharing the right things with the right people a lot simpler. Huddle lets you send super-fast messages to the people you care about most
Google TV Remote (Android) - Turn your Android device into a fully functional Google TV remote! Use the mouse pad, arrow keys, and the full range of buttons. You can also share videos and web pages with the TV and even use your voice to search for content.
To get started, connect your Android device to the same network as your Google TV
Google Earth (Android) - Use Google Earth to fly around the planet with the swipe of a finger. Explore distant lands or reacquaint yourself with your childhood home. Search by voice for cities, places, and businesses. Browse layers including roads, borders, places, photos and more.
For tablet users on Android 3
Google Play Games - Google Play Games is a must-have social application for all Android gamers.
It allows you to discover new fun games, play with your friends and see what they are playing.
In addition, you can keep track of your achievements and compare your scores with other gamers
Google Play services - Google Play services is used to update Google apps and apps from Google Play.
This component gives you access to Google Settings and helps apps speed up offline searches, provide more immersive maps, and improve performance.
Apps may not work if you uninstall Google Play services. You probably need this component