Quar are a fictional alien race, a concept for a world at the technological level of Europe during WWI. And they are a creation of Zombiesmith who together with Ganesha Games realized a gorgeous rule book for them. It is based on Flying Lead and Song of Blades. I bought it only for the extremely good graphics and for the love that the author put in it. This world, and the miniatures, are great. You can find more here.

Now there is even a computer graphic teaser of this saga. I like it very much, so I hope it for you.