The current release, OpenFOAM-v3.0+, was released on 13/01/2016. It includes improvements in all aspects of the code, including new pre-processing utilities, many extensions to snappyHexMesh, new solvers, new run-time image generation, new and updated documentation, and code from third-parties. For more details, see here.
Download instructions for Linux, Mac OS X and Windows platforms can be found here.
Information relating to previous releases can be found here