If you have not already, looking through the GeoMOOSE Demo can give you a good idea of how GeoMOOSE looks.
GeoMOOSE is very easy to install on just about any platform. Just follow any of these guides:
GeoMOOSE is proud to be free software. Our license reflects that.
Those really hungry for customization can visit our Developer Documentation. You can also find links to our RFC’s, API documentation, and release notes.