Version 0.16.4 is another bugfix release for 0.16.0, likely to be the last before 0.17.0 is released. The changes include:
Enter search terms or a module, class or function name.
Docs for previous releases are available on readthedocs.org.
Latest Salt release: 2015.5.1
Salt 0.16.3 Release Notes
Salt 0.17.0 Release Notes