The Internet is full of some very talented and generous people, and one of my fellow YouTubers matteo311GameMovies is exactly one of those people. He has made a Necron army list editor for anyone who wants it! I have had a good look at the editor and I have to say I think it's amazing, it even has all the Necron weapon stats on the list.
EDIT: Matt has now updated this editor for the new Necron Codex! Please check out my post here to find out all about it.
I already have a Necron list editor, but it has some errors in it. This one fits the bill perfectly though, and I gave thanks to him in the comment box and jokingly said "would be nice to have an Eldar one". To my amazement I get an email a few weeks later with an Eldar mock up version! That version is now complete (although still being tested) and you can find both army editors at the bottom of his video explaining how to use it
All you have to do is download it, click the options and enable the content, then press run. You will notice the two finished advanced Necron and Eldar editors at the top, but wait, there's more. You will also notice he has added some simple, work in progress editors for many other armies that he is working on as well.
Please go and check it out and support this very generous and talented person, he says the more feedback he gets the faster he works!