A revised list of Machinery Directive Harmonised Standards was published in the Official Journal of the European Union (OJ) on 28 November 2013. These Harmonised standards provide a presumption of conformity to the Machinery Directive 2006/42/EC.
The latest complete list can be downloaded from the European Commission website, but here's a worthwhile summary and roadmap of the most-recent changes dutifully prepared by the lads at U.K.-based MachineBuilding.net.