Android 7.0 Nougat (sort of) up and running on the Google Nexus 5
As aforementioned, there's no Bluetooth or camera, and quite a few other problems are likely to beset those brave enough to dive in. Impressively on a few days' work, though, the port offers RIL connectivity, Wi-Fi, basic audio, touch, and the display drivers are said to be in good working order.
It's still very early doors, but given the Android community's affinity to the Nexus 5, it's more than likely that a number of fully functional Nougat ports will be possible in the near future.
For now, if you've got a bit of spare time, a Nexus 5 collecting dust, and don't mind dipping your toes into the hackier side of Android, you can find the details at the source.
source: XDA-Developers via Android Headlines
Things that are NOT allowed: