Its been a while since since the Android 4.4 KitKat update started rolling out to the Galaxy Note 3 to a few users in Poland but after a wait its a good news for developers that Samsung has released the Android 4.4 KitKat kernel source code for the Galaxy Note 3
Galaxy Note 3 KitKat Kernel Source
So now developers can not only build custom ROMs for the device but they can also tweak around with the low-level kernel,Only if they know how to. Plus it is also a sign that the update will soon begin rolling out to other countries and regions, though as usual, it will be a few weeks before it reaches everyone once the rollout begins.
If you are planing to start developing custom ROMs for Galaxy Note 3 you can first take a look at its detail review here, Samsung Galaxy Note 3 Review : The Hulk and you can then download the kernel source for the KitKat firmware (N9005XXUENA6.) from the link given below.