Intel Hardware Accelerated Execution Manager (Intel HAXM) is a free hypervisor that can be downloaded from Intel and used to speed up Android emulators.

The Intel Hardware Accelerated Execution Manager (Intel HAXM) is a hardware-assisted virtualization engine (hypervisor) that uses Intel Virtualization Technology to speed up Android app emulation on a host machine. In combination with Android x86 emulator images provided by Intel and the official Android SDK Manager, HAXM allows for faster Android emulation on Intel VT enabled systems.