Here are some prediction and controller links that I've found useful over the years:Previsat - Free tool to show satellite orbits - Windows/Mac/Linux
Orbitron - Free (cardware) tool to show satellite orbits and control radios - widely used - Windows but runs on Linux under Wine
GPredict - Free tool to show satellite orbits and control radios - Linux but there is a Windows port
SatPC32 - Freemium tool to show satellite orbits and control some radios - Windows
WXTrack - Freemium tool to show satellite orbits and control some radios - Windows