I really like the programmers forum. In most games addons are made by 3D artists, scripters, and modders, but in LFS addons are made by programmers, and there is so much in the LFS docs that a programmer can go to town on. Sadly in recent years it has been taken over by people who would rather have code written for them than to actually learn, but there are still great things in the archives, and there are still some of us who try to keep it going.