LiquidFun is a 2D physics engine for games. It is an extension of Box2D and adds a particle based fluid and soft body simulation to the rigid body functionality of Box2D. LiquidFun can be built for many different systems, including Android, iOS, Windows, OS X, Linux, and JavaScript.
flixel-gdx is an open source 2D game engine written in Java. Flixel-gdx is a port of AS3 flixel. It is built on top of the powerful libgdx framework which allows developers to build and distribute cross-platform games.
Pure2D is a free and open source Game Engine for Android. It's designed for Android OS and built on top of OpenGL-ES v1.x. Pure2D provides a powerful API set and amazing performance.
Features:
Cross-platform development library designed to provide low level access to audio, keyboard, mouse, joystick, and graphics hardware via OpenGL.
An open source software framework. It can be used to build games, apps and other cross platform GUI based interactive programs.
A framework for building 2D games for the Android platform.