DDMF has updated Metaplugin for Mac OS X and Windows to v2.5.0.
This new version adds VST3 support, which is still considered beta with some plugs but in general it's working well. This will be further optimized over the coming weeks, so stay tuned.
A VST3 version of Metaplugin itself (plus all the other DDMF plugins) should be not too far away either.
Price: $49.
Find Metaplugin in the KVR Marketplace