If your budget is zero, look for the Project Open Sky (Posky) 737 models combined with a freeware FMC. While not as deep as FeelThere, they offer great visuals for free.
: A fully functional Flight Management Computer (FMC) with support for SIDs and STARs via a Navigraph database, and a fully working Inertial Reference System (IRS) . If your budget is zero, look for the
Carefully follow the installation instructions to ensure everything works correctly. If your budget is zero