The current release, OpenFOAM-v1612+, was released on 23/12/2016. It includes improvements in many aspects of the code, including new tools to seed Lagrangian cases using particles derived from Eulerian cases, a new suite of wave generation and absorption models, new boundary conditions, many new post-processing utilities, new combustion modelling, and significant improvements to the documentation. 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