A simple and fast-paced wargame, basically platoon sized.
The combat mechanics are not completely new, but they are blended in a very fluid and dynamic way. It's perfect for a not too intensive use and maybe campaign, and they look highly customizable too.
The unit creation tool is simply awesome, allows you to create an enormous variety of different archetipes and vehicles. The point system is sometimes buggy though, and you should use some mind to avoid overpowered results. However, it's the best creation tool i've seen around so far.
There's a free version online here: http://www.gruntomatic.com/
[4 of 5 Stars!]