Google has announced the open source release of LiquidFun, a2D physics engine that can be used on any platform with a C++ compiler, including Android, Linux, OSX and Windows.
Based on Box2D, LiquidFun features particle-based fluid simulation and makes it easier to write games that include realistic fluid physics. It also includes all of the standard 2D dynamics that Box2D supports so you can mix the types of simulation you are running.
Of course the star of the show is the particle-based fluid flow. For example this video clip below shows off its capabilities and I think you'll agree that its pretty impressive.
The LiquidFun library is written in platform independent C++ which makes it possible to use on any platform that has a C++ compiler. In open sourcing it Google has also provided documentation, including a Programmer's Guide and an API reference; a method to build the LiquidFun library, example applications, and unit tests for Android, Linux, OSX and Windows.
Currently at version 0.9.0, you can download the code from GitHub.