XtMapper

XtMapper is an free and open source key-mapper application for Android. It maps keyboard and mouse inputs to touch.

Key features:

• Emulate a touch pointer with mouse - Useful for games that only accept touch events and not mouse clicks.
• Emulate a D-pad with W,A,S,D or arrow keys
• Visual editor for key-mappings
• Per-app profiles support
• And more..