I briefly mentioned the new Zhong Yi Optics Mitakon Mark II lens turbo adapter for Nikon Z APS-C cameras in this post. The adapter is now available for purchase in three different mounts (via stkb.co.jp). Zhong Yi Optics Mitakon adapters are also sold at B&H and Amazon.
There is also a new Shoten LM-NZ M (L) adapter (Leica M mount lens to Nikon Z mount camera) with helicoid for macro photography. The previous version of this adapter did not include the macro/helicoid.
Techart released a new TZG-01 Contax G to Nikon Z autofocus adapter (this adapter was already rumored back in October):
