The D5300 and D5500 get firmware updates to version 1.01 to support the new AF-P 18-55mm lens. Curiously, the update also reveals that AF-P lenses add a menu setting for enabling VR and on the D5500 for enabling or disabling manual focus override. Both cameras also get some minor bug fixes.
Nikon Camera Control Pro 2.23.0 adds D5 and D500 support, as well as a number of small, but useful feature additions.
Wireless Transmitter Utility 1.6.0 supports the new WT transmitters, adds Turkish language support, but drops Macintosh OS X 10.8 support.
Everyone is going to want to update their cameras soon: Lens Distortion Control Data 2.013 has been released for the desktop software products (e.g. View NX-i, Capture NX-D), including data for all current lenses, and an in-camera edition should be coming shortly.
Also: Adobe updated Photoshop CC 2014 to version .4 and Lightroom to 6.4, which have a number of Nikon-related things in them. In particular, Nikon DSLR tethering with Mac El Capitan has been fixed. The J4 gets a color profile in ACR/Lightroom. 19 new lens profiles—mostly third party lenses—have been added.
I suspect we’re going to see several more updates soon.
Correction: an earlier version of this article indicated the firmware update was for the D3300 instead of the D5300.