This group of software displays information on all pilots and controllers connected to vatsim. Getting any of these is optional, but can be useful for determining expected traffic levels. Each one has its own features and abilities, none are endorsed by ZLA. You can find downloads and manuals below.
VATTASTIC is a website that allows you to view current ATC staffing and traffic levels on VATSIM (web based)
VAT-Spy is a simple application that allows you to view current ATC staffing and traffic levels on VATSIM (desktop based)