Useful tools for Android users

1. Free Mobile Helper
With Free Mobile Helper, you can manage your apps, music and data. And all the resource like apps, music and wallpapers are free to download.
2. Google play
With Google Play you can update your apps. You can buy free and paid apps here. they can be downloaded directly to an Android device through the Play Store or onto a personal computer via its website.
3. AppBrain
AppBrain is a website which makes sense out high number of apps available in the android market.
4. Amazon Appstore
The Amazon Appstore is a place to purchase and download apps for your android service. You can get a paid app free everyday, and see app recommendations based on your past Amazon purchase.
5.Aptoide
Aptoide client is an open source Android application that allows one to install software. The installed software comes from multiple sources called "repositories".
6. F-Droid
The F-Droid Repository is an easily-installable catalogue of free and open source apps for Android. With F-Droid, it's easy to browse and install apps on your device, and keep track of updates.
7. Market-Enabler
Market-Enabler is an application to fake the phones location and access markets from other countries -- does not circumvent need to add google account to device.
8. GetJar
GetJar is an app store for mobile phones, with over 1 billion downloads to date. The company's key point of difference is its open market approach.
9. Yahoo! App Search
Yahoo! App Search is an easy way to help you find and browse apps across the web and popular app marketplaces. You can search for iPhone and Android apps.
10. ApkSuite
Android apps and games for free from apksuite.com