Best, Fast and Easy to use Android Emulator for (x86 bit).

Genymotion “currently in beta” :  is available for Linux, Windows and Mac OS X.Genymotion
requires VirtualBox:
The virtual images code is open source available download Virtual Box .

Genymotion features:

  1. Easily download and run pre-configured virtual images: Android 4.1.1, 4.2.2 and 4.3 (with x86 support): Nexus 7, Nexus S, Nexus One, Galaxy Nexus, Galay S4, HTC One, Xperia Z, WXGA 10.1” Tablet and WSVGA 7.0” Tablet.
  2. Networking: Ethernet (emulates WiFi connection).
  3. GPS (with configurable coordinates) and battery (with configurable battery levels) emulation widgets.
  4. Display: OpenGL hardware acceleration, multiscreen, full screen display.
  5. Genymotion shell which allows you to interact with your VM using a command line.
  6. ADB support.
  7. Eclipse and Android Studio plugins.
  8. Supports Linux, Windows and Mac.