Simviation

Simviation is a foundational site in the flight sim community and has served as a massive, free file library for decades. It is a "go-to" resource for simmers looking for freeware add-ons, particularly for legacy platforms like Flight Simulator X (FSX) and Prepar3D (P3D), though it also hosts content for MSFS and X-Plane.

The site is essentially a vast repository, well-organized by simulator, content type (aircraft, scenery, panels, sounds, etc.), and file author. You can find thousands of free-to-download aircraft, from airliners and military jets to GA and vintage planes, as well as scenery for thousands of airports, utilities, and other enhancements.

While it is an older site, its longevity and the sheer volume of its exclusive file library make it an essential bookmark for anyone looking to find rare add-ons or browse one of the largest collections of freeware ever assembled for the hobby.