EagleDynamics – DCS Forum

FlyingFalcon – F-16 Forum

Viperpits – F-16 Forum

CheckSix – French F-16 Forum

Free Digital Combat Simulator. – Digital Combat Simulator

Free monitor based guage & switch software. – Helios

Free software to use with Arduino to make switches work in DCS World. – DCS BIOS

Fairly cheap and easy to use IO Boards to connect Fx. switches from panels. – Arduino