I love the founder's friendly attitude and the idea of an open platform with a strong community. It reminds me of Dwarf Fortress. Admittedly, DF is not open so

I love the founder's friendly attitude and the idea of an open platform with a strong community. It reminds me of Dwarf Fortress. Admittedly, DF is not open source, but it's free with a wonderful community and a very transparent development process supported by donations.