Downloading goArma 1.9.7 from our website was free. The following versions: 1.9 and 1.0 were the most frequently downloaded ones by the program users. GoArma.exe is the common file name to indicate the goArma installer. This free software was originally produced by VetLabs. GoArma relates to Games.
From the developer:
goArmA uses .net technology from Redmond, therefore an installed .net-framework is required to run our software. goArmA has been compiled with version 2.0 of the framework.
Either you let the installer link to the official download site, or you simply google around to find it. If you regulary update your windowed OS ;-), the framework should have been already installed by the system itself.
You may want to check out more software, such as Tank'd or Zombie Smashers X2, which might be similar to goArma.