symbolset writes "X-plane is a cross-platform flight simulator app, notably the only serious one that supports Mac OSX and Linux. It was the first to include NASA data in their terrain modelling. It's now under threat by an NPE (Non-Practicing Entity) called Uniloc. Uniloc is suing for things X-Plane has done for decades. X-plane cannot afford to defend this suit, so if somebody doesn't step up and defend them then we lose X-plane forever. Quoting: 'I have spoken to a lawyer about this, and I am told that it will cost me about $1,500,000 (one and a half million dollars) to defend this suit. He also told me that it should take about two to three years to defend. This is more money than I have made selling Android Apps in the first place.'"