Requirements: (for all Android versions)
Overview: Control a computer anywhere in the world from your Android device!
VNC® Viewer connects your device to a computer, displays its desktop, and lets you take control. You can run applications, change settings, and access data exactly as you would be permitted to do were you sitting in front of it, and using the keyboard and mouse.

VNC Viewer is from RealVNC, the inventors of VNC. It can connect to any Mac OS X computer, and to any Window, Linux, or UNIX computer running VNC-compatible Server technology. RealVNC recommends VNC Enterprise Edition for robust, secure, and high-performance connections, and for its unrivalled flexibility