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Airnef is a Free, Open-Source Utility for Downloading Images to Your Desktop
Airnef is a Windows/Mac OS/Linux based open-source utility that allows Nikon users to download images from their Wi-fi enabled cameras (built-in or via WU-1a/WU-1b adapters). It even works with Wi-fi enabled Canon devices, too (though Canon's EOS Utility has much of the same functionality, but not all).
From the TestCams YouTube Channel:
Airnef is a free, open-source utility for wirelessly downloading images and videos from your WiFi-equipped Nikon and Canon cameras. airnef runs on the Windows, Mac OSX, and Linux operating systems. Go to http://www.testcams.com/airnef for more information and download links.
Sections:
00:00 - Introduction
00:45 - Selecting basic method for choosing which images to download
00:56 - Selecting images in the camera for download
02:14 - Configuring Windows to automatically switch to your camera's network
03:07 - What happens after clicking 'Start Download' for images selected in the camera
03:55 - Transfer Report after downloads have completed
04:37 - Select images on the computer for download