Hello everyone!
I present myself, Philippe artist at Arcen Games.
I've had the luck to work with the talented guys at Arcen Games for a while now on AI War : Fleet Command.
We've decided to share the art used in the game for other Indie Developers.
Here are exemple of Ship Graphics assets :
Ships in action

:
If you are interested in using these graphics for your game please follow these simple yet fair rules :
Whoever you are, an indie developer or otherwise, you're free to use the graphics in this library for whatever purposes you want. Don't sell these graphics by themselves, but you can include them in your game, your pictures, whatever, and then you can sell your work with this art intact. You can modify them as much as you need for your purposes, as well. Make a new RTS, make some other genre of game, whatever. Just please be sure that you attribute the art to the artist(s) that created it.
For more information and download link you can check out
Chris's original blog post.
Enjoy and keep creating games!

Phil